Here's an article talking about the study:
https://metro.co.uk/2019/02/22/men-r...y-20s-8718590/
It's just one study though. There are more that say women peak in their 40s.
I don't know if it's a case of settling for what's available or what, but old people still fuck each other (gross) so there's something there.
I asked my dad the same thing. He just told me the older you get, the more you find women your age attractive.
I personally haven't hit that point either. College-age women are on average more attractive than women in their 30s, to me at least.
They dress less sexy, things start sagging, and they get more cranky.