Constellagender

When an individual is bigender and/or multigender, but instead of each gender being separate entities, they become a new entity entirely.

Symbol from Flaticon (link)

Fun Fact: I went with constellations because constellations are made up of two or more stars, and they're seen as a completely separate thing from the stars within them. My partner sys gave me the constellation idea!

Have a purely space flag for it too! For fun!