But as Mijin responded,
Having a preferred specialized phrase to describe your own gender identity doesn’t mean that you are declaring that phrase to be some kind of officially recognized separate gender category.
Any more than preferring to describe your eye color as “slate blue with grayish-green specks” means that it can’t be validly described on official documents with one of the ten or so standard eye color codes for standardized color names like “blue” or “gray” or “brown”.
(When looking up official lists of eye color codes I was a little startled to find that all of them seem to include “pink” as one of the standard eye colors, but then realized that duh, many people with albinism do have eyes that appear pink. Diversity and inclusion for the win!!)