I think it depends where you post- on FB it would stand out a mile and I'd be quite astonished if one of my friends posted there, they mainly seem to post pics of cats (so do I) and their Strava results and not much more these days. So, that would be eyepopping.
On TikTok or Insta these are visual mediums where people post about their bodies all the time, not just to friends but the wider world- my late teen daughters spend time scrolling through and a lot of young people seem to spend a lot of time prancing about with not that much on, crying, doing strange types of make-up, showing off scars/body empowerment vids. you'd fit in fine there!
I think the fact that mumsnet is so outraged by this is rather sad, one individual person who feels better about their body is a good thing. If you'd posted 'how can I feel better about my appearance since having a baby' it would have been full of advice on bb creams, exercise, blah- it's still mainly external.
The papers are constantly full of women at awards ceremonies wearing identikit strange sparkly dresses with cut out bits and high shoes showing their legs/breasts etc.
It's all very weird, and you are not the only one affected by the male gaze, pretty much most women are so I'm not sure why the morality police are coming after you.
Post them if you like them, just choose your audience, actually there will be a place for a self-empowerment type vid of an ordinary person, my feeds are full of them (e.g. very obese to slim, make-overs, skimpy clothed people with ordinary bodies) so go ahead if you want.