You know damn well this isn’t about surgery. It’s about hormones, and it says so right there in the summary. You didn’t even have to click the link. Nobody is doing breast implants on trans minors (only on cis minors, which is perfectly fine for some reason).
Forcing a trans kid to go through the wrong puberty even though they know they are trans is extremely traumatic. It’s life ruining. It alters the voice, the shape of the torso, the shape of the face, and facial and body hair in ways that either can’t be fixed at all, or can only be fixed with expensive surgeries later on.
And if you want people to be absolutely sure about their status before going on hormone replacement therapy, then that is exactly what puberty blockers are for. Leuprorelin prevents puberty so that the kid can figure themself out for a year or two, and then make sure they go through the correct puberty. Even if they decide not to be transgender in the end, they can just go off leuprorelin and start puberty.
Even if Trump doesn’t abuse his power to escape this, he will die of old age before 4 years are up.