I mean I go pretty effortlessly closeted at work as a non-binary trans person even though my hair is a neon rainbow and people clock me as both male or female on occasion. Coming out of the closet to some select folk tends to elicit way more blindsided surprise then seems reasonable given I don't think I could look more stereotypical enby if I tried. My conclusion is cis people in general are pretty trans blind outside of the binary. Infra and Ultra gender sounds about right.