Most Republicans position on that is to run away.
It should absolutely be that no one under 18 y/o is allowed to take hormones of the wrong sex and no transitioning.
Parents have no right to abuse their children, and cutting off your kids penis is insane abuse.
If someone imagines themselves to be blind, what should happen to a surgeon who puts their eyes out?
If someone imagines themselves as paraplegic, what should happen to a surgeon who transects their spinal cord?
This use of "children" or "under 18" implies that this phenomenon is real, that it's not a delusion, and that the only issue is that "children" are unable to consent.
This is fundamentally wrong, and the GOP embracing delusions (of adults) is bad for it, even in the short run.