We are not 'biologically nonbinary', it's actually fairly rare for us to be assigned X at birth, the majority of us are given an assigned sex.
Intersex is a catch-all for a huge number of variations,...
Posting because it's frustrating how often I see nonbinary folks say they want to "transition to intersex" just noooo that's not what intersex is. Like congrats on figuring out body transition goals but just that idea that "intersex is ambiguous genitals and that's all there is to it" kept me in the closet about being intersex for years.