My opinion is that being trans, whatever that means, isn't a thing in itself. It is always a sympton of another thing.

For young girls it's a reaction to being sexualised or sexually assaulted, to escape femininity.

Or its more likely TBFH the new "i'm totes bi guys!!!!/otherkin" with a shitload of affirmation thrown at them

For young boys it could be homophobic parents treating them as a girl, it could be a reaction to seeing how girls get preferential treatment.

The numbers spike is pretty much seems to be only on females, the male numbers are/were pretty static.

For most "trans kids" (I hate the term) their issues resolve themselves after puberty, when the crazy hormones and changes have settled down and their minds become more mature. But when doctors and TRAs tell them that perfectly natural fears about bodily changes, and a dislike of your body during puberty, are actually evidence of you being the other sex, and that "bexoming trans" solves this, then of course the kids would jump at it. Puberty sucks for most people at some point.

The problem is puberty blockers and the pretty much full scale abandonment of "wait and see" approach. over 90% of childhood gender dysphoria self corrects during puberty, put a kid on blockers and it seems to not self correct at all. But disturbingly the fact that puberty blockers causes a temp issue to continue and that is seen as good thing...

Personally I think its going to be this generations thalidomide baby scandal or maybe Lobotomy.