They can’t make life changing changes until they are legally adults. Puberty blockers are an established and well known decades old treatment for precocious puberty (and none of y’all have a “think of the children” hand-wringing shitfit when a child is prescribed puberty blockers for that). It s a temporary respite to pause puberty until adulthood, then *they* get to decide, as adults. Thems the rules.
I correct people thinking this every time it crops up.
If an AMAB child takes puberty blockers and as an adult wishes to transition, blockers stops a lot of the damage done by puberty: bone development, eye socket shape, nose definition, jawline contour, forehead and browline — all that pubertal bone development needs to be ground away, so it saves unnecessary and expensive surgeries (I had this in 2019). No laryngioplasty, voice breaking doesn’t happen, no electrolysis to remove facial hair. Its so much easier if they don’t go though it all. Adults transitioning after childhood puberty blockers get excellent results with very little invasive work.
If they decide to carry on as male then they just stop puberty blockers and puberty resumes, no harm to reproductive ability as puberty was never started and T development is still well within a developmentally effective window.
Listen to trans peoples stories. We’ve been there.