Dispargender is when someone feels like they do have a gender, but it is missing. It is different from agender because they do not feel like they don't have a gender, just that their gender they did have is gone.
A similar term exclusive for neurodivergent people is Caedogender.
History
The term was coined on January 14th 2021 by fandom user Lunarblema . The term was picked up by ChimpsModeNow after Lunarblema left.
Flag
The flag was coined on January 14th 2021 by fandom user Lunarblema. It is unconfirmed if it has symbolizm.
Etymology
The prefix Dispar is based off of the Romanian word dispărut, which means missing.