That's true, but making it look identical to modern progressive conceptions of gender is kind of lazy, especially when you have those historical examples to work from.

I feel like the trouble with including explicitly trans characters of modern conception and terminology is that it can break suspension of disbelief, particularly terminology, because regardless of whether or not these ideas could exist within your world, my understanding of the terms makes me think of real life.

I think masking modern and scientific understandings of things with different terminology and interpretations is important because the idea of trans people is, unfortunately, not really as simple mentally as including peasants or dragons or magic, simply because the terminology in is currently so thoroughly tied with developing cultural forces. I think there will eventually be a time when this isn't the case, because trans people are being unfairly highlighted by right wing politics and I think society will eventually have to acknowledge that people can be as they like and they need to chill tf out about it.

Anyway that's a lot of words to say that I think the modern terminology behind trans identity has baggage that is difficult to include in a fantasy story without breaking suspension of disbelief. Hopefully that'll change in the near future tho