Conviction is 9/10ths of passing, especially at a time when speaking out in the way Enjolras does would have been coded as male. There's a long history of passing women (historical term, no idea if they were actually women or not) who we would have immediately read now but no one did then.

No worries. I'm pleased that someone, somewhere, in some fandom, is writing a fic that involves a trans man because I haven't seen one before. That's cool of you to do! Hope I'm not adding any pressure.