Oof that's hard. I was eating disordered as a teen (restrictive, anxious, not endlessly losing weight but stayed under 100lb and I am 5'9") before social media, my kids seem less hung up about it, there is more diversity in women's beauty images and so much obvious fakery I think they see these more like art and not aspiration.
My husband watches workout stuff though and he says any guy with unusual gains is on steroids.
I do think plenty of the men's images are doctored too.
Healthy living is healthy, that's not in question. Obsessive healthy living is not healthy, when it's causing you anxiety. I have been there even as an adult, was doing the intermittent fasting and when I went to eat felt that dragging fear, instantly recognizable from my youth, did not want to eat. I can think my way around it now, but WTF? If you feel that way about occasional sugar or beer or whatever, that is not a healthy impulse, it's a bad sign.