When I was a preadolescent girl, I dreaded the changes of puberty. Thinking about someday getting my period filled me with absolute horror and panic. I hated the idea of my body changing to be that of an adult woman. It caused me no small amount of distress. (For me, it was all centered around my actual body, not any societally enforced gender stereotypes--I've always been fairly comfortable somewhere feminine-of-center in terms of how I dress and present.) I was completely uncomfortable with having a female body, and its very femaleness, and the changes that would entail, made me want to freeze time so I would never develop an adult female body.
But time marched on, I grew up, and my body changed and it wasn't that awful. The older I got, the more comfortable I became living in a female body. I'm not exactly a paragon of body love now, but I probably hate my body only as much as the average American woman does, and I feel comfortable with its femaleness. (Coming out as a lesbian sure did help!)
I'm so glad that I grew up in the nineties, before "gender dysphoria" was widespread and puberty blockers became a normal response to it. What I experienced sounds similar to the experiences I've heard described by some trans people; if I'd been exposed to those ideas when I was young and impressionable, it would have been very easy to interpret my discomfort with my own body as a sign that I had been "born in the wrong body" and was in fact trans. I'm so glad those ideas weren't popular when I was younger because I might have taken steps to change my body that were in fact wholly unnecessary.
I seriously wonder whether a girl going through the same experience today would be given the room and time to grow up and grow out of her discomfort like I did, or if she would be pushed into identifying as trans and getting on puberty blockers and eventually cross-sex hormones and surgery.