There's crumbs all over the internet. Start with the transvestigations since it's mainly a biological difference between men and women's physical bone structure. There's a lot they can do to mask their inversions but there are some things that just can't be altered. There's some testimonies and images out there but they are tough to find now since the archive was erased when big tech nuked our hashtags. I might have saved something since I've been archiving for years so I'll check and see what I can find 🧐