I've been a teacher since 2001.
I've not seen any children struggle with their gender identity; I've seen two struggle with the narrow constraints that society puts on children through heavily gendered toys and clothes and colours.
And one I knew at school who wished he was a girl so he could play in the home corner without being bullied.
One child I taught was seen by the Tavistock. No dysphoria. Just 'gender non conforming' (and autistic.) it was an extremely clear progression from liking pink stuff and long hair, to upset he "wasn't allowed" (was at home just not at school- but then made me query why the girls uniforms had to be quite so frilly etc) to being told by an older teen sibling (or their mates) he was clearly born in the wrong body.
All the upset was the stuff. The clothes. The colours being "gendered."
Gendered toys creates gendered minds.
(Literally; girls perform lower in geometry than boys when exposed to less 'boys' toys like construction, Lego etc.)