(epistemic status: shitposting)
Some radical feminists complain that males body-modding to become facsimiles of women is appropriation. They're obviously correct, but the claim doesn't seem strong enough to override the right to bodily autonomy. The Law in its majesty finds a precedent in the archives of copyright law: bands recording cover songs are appropriating the work of the original composer, but the composer's claim to control and be compensated for their work doesn't seem strong enough to override the band's right to artistic expression.
The solution in either case: compulsory licensing! A small tax is administered on transition services (hormone replacement therapy, facial feminization surgery, &c.), the proceeds of which are distributed equally amongst all natal females (as if they held a collective patent on the female form).