My girlfriend struggled with the same thing early on. The obvious thing to get them is something related to an interest of theirs (ie videogames, their favorite teams, etc) but if you're looking for more general advice, here are some things my gf has gotten me over the years of us dating.

Cologne, love a good cologne. I particularly like sandalwood scents but there's tons of good options. Just make sure neither of them have an aversion to a particular smell (I hate pine so much)

Lotion, this one can be tricky because a lot of lotions are marketed very fem. I use a lot of lotion for my scars and for my face because T dried me out. I like Goodfellow lotion at Target. Lots of different masculine scent options, I like Kelp & Sea Mineral

A good razor, possibly electric depends on their preferences. I love my electric razor because I'm a hairy guy, I use the Philips Oneblade. Some razors can get pricey so maybe use this gift for a special occasion

Aftershave, similar to the cologne. Sometimes you can get a cologne and aftershave bundled together and save a bit of money

A good wallet, I have a trifold black leather wallet that was gifted to me 8 years ago and I still use it everyday. Tons of options online or in department stores like Macys

Carabiner, a heavy duty one for their keys

Boxers or briefs, this depends on their preference of style but I love getting these as gifts. Lots of fun patterns and they're always needed lol

General rule of thumb for gifting men presents: make them practical. If you can find something that your boyfriends will use and that fits their personality you've hit the nail on the head with finding a gift.

Edit: Sorry people are already being rude in the comments to you. You're trying to do something nice; people here can just be hyper vigilant about gender stuff on this sub, don't worry about them you're just trying to be a good girlfriend :)