It is important that we do not apply our modern biases onto historical people and events. We aren't even settled on a definition of "transgender" nowadays(do non binary people count? non dysphoric? cross dressers?), so that makes it even less salient to historical analysis. It makes everything even more complicated when talk about female historical figures when we consider that until very recently, women's participation in the public sphere was EXTREMELY limited, and there were obvious incentives to present oneself as a man that had nothing to do with one's own identity.

One of my favorite historical figures, Qiu Jin, who fought for the end of footbinding, published the first women's newspaper in China, and was an important figure in the Chinese revolution, also dressed/presented as a man often, and fled her arranged marriage. If Qiu Jin were alive today, would she identify as a trans man, gender queer, non binary? Personally, I highly doubt that. But either way, that's a question we can't answer because those terms did not exist in her time, and thus it wouldn't be appropriate to use those terms. She just as likely would have been a woman who doesn't even wear men's clothing if not out of necessity. She wrote poetry about women's liberation and obviously her pet issues (like ending footbinding and promoting women's literacy) were about women. Being GNC or presenting as a man, for women in history, was often a survival skill. It really tells us nothing about the "gender identity" of these historical women who did not have the luxury of thinking of "gender" in such terms.

I'm just thanking god that my favorite historical figures are generally not white so the TRAs don't know they exist and thus won't try to posthumously trans them.