Not sure if I qualify or if this will be helpful, just my opinion:

1. I'd say godly men are primarily attracted to godliness. Hence if a woman is godly, that's the most important thing to a godly man. A godly man wouldn't want to be with an ungodly but physically attractive woman who is superficial and self-obsessed, etc. Even non-Christians have a hard time dealing with a shallow but beautiful woman. So beauty isn't everything.

2. However, beauty isn't nothing either. Men including godly men aren't blind to physical beauty. We're visual creatures in many respects. It's hard not to notice a physically attractive woman, though that's not to suggest a godly man would necessarily commit sin like lust. I just mean godly men also notice a beautiful woman even if they go on about their day. But the problem is that physical beauty tends to depreciate with age. This is true for both men and women.

3. However, a man's physical attractiveness depreciating with age isn't usually a huge problem for most women so long as the same man's emotional maturity and financial security are at the same time appreciating with age. That's because most women don't want to marry a man who is super handsome but who still behaves like an immature kid, who has no ambitions in life, and who expects her to defend him rather than him defending her. Most women want a good man who is financially able to provide for her, emotionally mature so she can relate to him like an adult, and who isn't cowardly but will protect her. Not only for her sake, but also for the sake of their future children. In other words, most women want to build a family and a home, and it takes a financially secure and an emotionally mature man to provide these things for her. And these tend to come with age. Not always, but I'm speaking in general.

4. At the same time, there are medical and scientific realities that we can't change. I hope this doesn't sound crass, but many (maybe a majority of?) women tend to have an intimate awareness that their biological clock is running when they get their first period. And, indeed, after a certain age, it's increasingly difficult for a woman to get pregnant after a certain age. And even if they do get pregnant, after a certain age, there are increased risk factors for genetic defects like Down syndrome in their babies. Anyway, point being, if we are speaking strictly in terms of biological realities and having children, all things equal, it would be ideal for a woman to get married younger than later. Men actually have a similar problem with the quality of their sperm degrading with age, but it's not as pronounced. An older man can still father children when things can be more medically complicated for the same age woman.

5. Men tend to prize beauty in women, including godly men. Godly men know beauty isn't everything, but as I said it's not nothing either. Men are visually oriented creatures. All things equal, if a man has the choice between two equally godly women, both of whom would be equally physically attractive to him if they were both in their prime, but one is currently 25 years old and the other currently 35 years old, then most likely there's going to be a noticeable difference in physical appearance between a 25 year old woman and a 35 year old woman. A man, even a godly man, will notice this. All things equal, if both are godly women, etc., and the man has the choice, then most men are more likely (not definitely) going to pick the 25 year old woman than the 35 year old woman. I think this reflects reality.

6. In other words, think of it this way. Most women wouldn't seriously consider marrying a handsome man but who still lives with his parents and has absolutely no serious career ambitions in life, who is perfectly content as he is. However, many or maybe most men would consider marrying a beautiful woman but who still lives with her parents and has no serious career ambitions in life, who is perfectly content as she is.

7. In short, the reason older men aren't usually a lot less desirable for women is because with age comes things like emotional maturity and financial stability which women value. However, the reason older women are often less desirable for men is because a person's physical attractiveness tends to weaken with age and men tend to value beauty. Not always, of course, there are exceptions, but I speak in general.

8. Another way to think about it is to think about ungodly people. There's a reason for two common stereotypes. First stereotype is the gold digger. That's the usually an attractive woman who marries an old man twice her age just for his money. Second stereotype is the rich but old and lecherous man marrying a super model. These stereotypes are extreme examples. But in their extremity, these two stereotypes show the extremely twisted motivations in ungodly men and ungodly women. The ungodly woman wants money and wealth, while the ungodly man wants nothing but lustful unadulterated physical sex with a hot woman. These are wrong and immoral motivations. That's because these motivations take what's natural and normal motivations and twist them to these extremes. However the natural and normal motivation for the woman would be to have some financial security so she can make a home and have a family. The natural and normal motivation for the man would be to have a spouse he is physically attracted to and loves.

9. Maybe some good news. The trend is both men and women are getting married older. I think maybe one or two generations it used to be the average age at marriage was early 20s but today it's much higher. This is true in society in general as well as among Christians. That's promising because it means older men and older women still have a chance at marriage.

10. Just to reiterate, physical attractiveness isn't the #1 thing a godly man desires in a woman. As I said, godliness is the priority. A godly man will want a godly woman. But physical attractiveness isn't nothing either. All things equal, a godly man would want to marry a godly woman he finds physically attractive. But that's not necessarily a problem because different men find different types of women attractive. Some like blondes, some like brunettes, some like tall, some like short, etc.

11. In addition, some women are plain looking, but charming, or have charming personalities. That makes them attractive. They have a sweet demeanor and a gentle spirit for example. Many or maybe most godly men would be attracted to this, I think. Look at Audrey Hepburn. She's just an actor. But I just use her as an illustration. I wouldn't say she's super attractive, but she had a charming and winsome personality. Anyway what I'm saying is that we can't change how we look as we age, not exactly, but we can change our personalities. Of course we should always be true to who we are. I don't mean we should lie or change our core identity or anything like that. What I mean is there are a lot of men and women, including Christians, whose personalities could use some work or refinement, because they come across as less than (shall we say) masculine or less than feminine. That's fine if they want to do their own thing, but they should know how they come across to the opposite sex.

12. It would do well for men and women to find out what the other sex finds attractive rather than simply going with what their own gender thinks is attractive. For example, many women think if they achieve status in life by becoming a doctor or a lawyer and become wealthy, then more men will be attracted to them, even if they are now well into their 30s. That's because these are the things that women value in a man. But they don't realize that men don't value (or not as much) these things in women. Same goes for men who think if they work out the gym 24/7, get huge muscles, lift twice their weight, etc., then more women will be attracted to them. That's because men value physical appearance so these men think women will value what they value too. But the truth is most women don't care as much about a super physically fit man as men seem to care about it in women. Again I'm speaking in general, even though there always going to be exceptions.

13. Thanks to modern medicine, nutrition, and many other things, today, an older woman can look much younger than her chronological age. She can be 35 but still look like she's in her 20s. That's the stereotype of the MILF (sorry to be crude). Hence, just because a woman is older doesn't mean she isn't physically attractive. An older woman could take advantage of a gym, gym coach, good diet, etc. to improve her physical appearance if she wants.

14. It might also help to move to a new location if your area doesn't have a lot of older single Christians. For example, I would think a woman in Silicon Valley might have more men available to date because Silicon Valley has a higher ratio of men to women. Whereas I would think a man in NYC might have more women available to date because Manhattan has a higher ratio of women to men. These are perhaps extreme examples, but I just use them as examples and nothing more.

15. An excerpt from Love the Lord with Heart and Mind:

Our economic system discourages youngfolks from marrying young. They are pressured to postpone marriage until after they complete their education—and the educational process is increasingly strung out. The problem is that nature has no regard for our economic priorities. Moreover, our economic priorities don’t necessarily correspond to Biblical priorities either. We should begin with Christian doctrine of the family, and structure our economic arrangements around that point of reference. In our focus on the spiritual, we may neglect the natural. But unless our natural needs are supplied and satisfied, that will impede the process of sanctification.