Just to emphasise the numbers. The Tavistock has seen a 4000% increase in referrals in girls over the last couple of decades.
It's implausible that that can be attributed to increased acceptance meaning more with gender dysphoria "coming out". There was no remotely similar effect for gays.
Even if you assume a HUGE multiple of five from an acceptance effect, there's 3600% increase remaining for which the best guess is social contagion.
Which leaves you with at least an 85% chance that any individual girl saying she's "trans" is part of the new social contagion cohort, and you need to dig down into what this is really about.
And even among the original cohort, it's not like every referral ended up transitioning - the majority of cases resolved on their own during puberty. At least until they started using puberty blockers.
So, get the child some therapy, try to keep them off the internet so they're not hanging around in pro-trans spaces (just as you wouldn't let them hang around pro-ana spaces), ensure they don't go down any path leading to puberty blockers, and then they can make their own decision as an adult.
I still think anorexia is the best comparator here - people figured out that it was necessary to clamp down hard on pro-ana for the sake of children. It's bizarre they can't see why pro-trans is the same problem. It's like they want to induce gender dysphoria. It is a real condition, but why do you want to induce it?
Just looking at Wikipedia:
Pro-ana organizations differ widely in their stances. Most claim that they exist mainly as a non-judgmental environment for anorexics; a place to turn to, to discuss their illness, and to support those who choose to enter recovery. Others deny anorexia nervosa is a mental illness and claim instead that it is a "lifestyle choice" that should be respected by doctors and family.
Quite similar, but the difference is:
Many medical professionals and some anorexics view pro-ana as a glamorization of a serious illness.
Pro-trans is glamorisation of a serious illness - gender dysphoria. But the medical professionals aren't calling it out.
And many, many children are being sucked in. (And adults, but at some point you have to let people make their own choices).
I'm sure this will be blindingly obvious to everyone in the medical profession in 20 years time, not just us, but if they could just hurry up figuring it out, that would be swell.