The thing that annoys me lately is if your kink is for a male character to have a vagina it seems like the only options anyone tries these days are to make him trans or go omegaverse, and both of those bring in a bunch of other worldbuilding and characterization baggage that's distracting whether you leave it out or put it in. I don't know this canon but it sounds like it would almost make more sense that he's a cis dude who just got stuck with a vagina because reasons. I miss "cis dude who has a vagina because reasons" fic.