I know trans people have existed since... a long time ago (despite what transphobes says) but...

When was HRT and/or surgery start to exist?

In case of trans men, when were binders invented?

The reason I'm asking this is because I'm planning to make a game which takes place during... around whenever Frozen (Disney movie) is supposed to take place, let's put it that way (by that I meant the time period is vague, and players will get to know when it's NOT taking place, that it's not taking place during modern day)

and I planned a trans character to be there. It takes place in a fictional kingdom.

Actually, 2. Both trans guy and trans girl is there.

Would them having HRT or HRT's existence being implied at be incongruous to the settings,

or is it good to go since that fictional kingdom literally has magic and technology that is sufficient enough to create a Blahaj machine gun that takes care of itself and has infinite ammo (yes, that was not bullshit I made up for this post, I literally drew the character who uses said gun)

Or is it good to go because hrt existed for a long time as well?