I’m of an older generation, where being trans wasn’t a concept I had heard of in my teens/twenties. If being trans was an “option” when I was in my teens, I very likely would have thought I was trans or at least non-binary, but only because I was uncomfortable in my own body and trapped in an environment that forced traditional gender roles on me. I hated being perceived as a woman, primarily because of all the expectations/sexual objectification that came with it.
I spent my early twenties as a “pick me” girl, steeped in internalized misogyny. I really thought that I hated women and was the “cool girl” who was only friends with guys because they were “less drama” etc. (I cringe when I look back at that time in my life) I was also working through some serious trauma and CPTSD.
As I grew older, I realized, if you’re a woman, then anything you do qualifies as “being womanly.” You can decide how to (or even IF you want to) perform femininity. I personally am childfree. I do not associate being maternal or birthing children as necessary to be a woman. You can be as “feminine” or “masculine” as you want and you can even change it up day to day! I’m in my mid thirties, and am still learning what it means for me to be a woman. I play around with it every day.
I don’t know if this is the answer you were looking for, but I hope it helps!
*NOTE* This is my personal lived experience and is not meant to diminish how anyone feels or dismiss anyone who is trans or non-binary. Being trans was not the answer for me personally, but may be the right concept for someone else.