I noticed the opposite physically and very starkly when my high school was trying to get us to all send in things for the 10th reunion (US high school - so we were all 27-29 and some people were really pushing for this in a way that isn't common in the UK).
Pretty much all the guys were already going bald and a lot of them had 'dad bods' & just looked like they'd aged quickly whereas pretty much all the women, including those of us who had multiple children and happily showing pictures of themselves with them, yeah some of them looked more tired, but in general looked young & well & in similar shape to before.
Now it's coming up again and yeah, signs of aging are there, but it's way more noticable in the men than women. I think it largely depends on lifestyle even more than having children - where I'm from, there is a large association with masculinity and alcohol and I think alcohol and other drugs and a generally harder on the body lifestyle can really age people fast. Some of it will also be genetics and other factors - sex probably only plays a small role in this, and I just have a weird sample where there is such a stark divide between the sexes (I joke there must be something in the water).
I also think it's socialization and how we're perceiving things - if we expect X way of people 'looking our way', then we may not notice all the other ways.Maybe because I was raised to think I'm ugly, I've never expected attention, but I notice my friends who say no one looks at them actually get far more than they think, it's just more subtle or not in the way they expect. I don't put full stock in the love languages stuff, but different people have different ways of giving that kind of attention. I also think as a lot of people pair up that some people just switch off looking at other people like that - not everyone obviously, but it's a thing.
You may be in a space OP where your opinion is not being listened to and assume it's because of your attractiveness when it can be other factors like they're assholes or a lack of assertiveness around your opinions - if you assume you won't be listened to, you may act differently than those who think they do.