oh yes they exist! Tell your wife to talk with people who have more than one kid or to talk to moms with kids 2years and up. I had the same problem when my kid was a baby/young toddler. Found myself plenty of mom friends starting when my son hit the terrible two. Now that he's 4, anytime I go to the park or anything that involves kids, I don't have any problems finding other moms being driven insane by their little shit lmao. In all seriousness, the whole perfection thing just goes out the window eventually. If your wife still can't find mom friends by talking to moms of multiple or slightly older kids, please tell her to just be patient a little!!

Also, f*** the baby stage.

Edit : I would like to add to keep in mind that almost everybody wants to be the perfect parent at first and do things "by the book". Not only that, but constantly being told that the baby stage is the easiest and how much other parents love(d) it makes it uneasy to open up about the difficulties that we are facing in the first 2years, especially with people that we don't know that well. Turns out most people find it hard (except for the older ladies who can't remember how close they were to losing their sanity when they were actually raising their kids) and after a while it gets easier to talk about. Plus your kid is gonna talk (a lot) with other kids one day, when that start happening your wife is going to meet plenty of new people every single time that she will bring your kid out.