A xenogender is usually connected to something nonhuman or not traditionally associated with gender (I think, I have adhd autistic brain as well and memory sucks ass) for example genderfae (gender feels connected to fae or fairies) or genderfaun (nature)
Usually those with xenogenders use neopronouns, which are pronouns other than he/him, she/her, they/them, it/it’s, and (I think) xe/xem
Examples of neopronouns: mew/mews bun/buns