You don’t need surgery or medication to know you’re trans - some children know it from an early age even before any medical intervention. Also, I think you’re conflicting gender identity and sexual attraction. A trans woman can be straight, gay, bi, pan - or anything else. This is a question of how you feel comfortable expressing - not who you’re attracted to. There absolutely are aro ace trans folks who have no interest in any relationships or others’ perceptions or interests… They’re just making themselves comfortable with their expression.