I recall having the reverse - I told a senior trans boy that they'd need to formalise their change of name in order to have their new name on their exam records. I was thinking of university and/or job applications.
They declined. After leaving school, they reverted to their original female identity...so I do wonder how much peer pressure had to do with being trans in the first place.
I can't think of one single trans boy who retained their trans identity after leaving school. As I've said before on other threads, I'm struck by the fact that girls stopped coming out as lesbians at school. Looking back, other pupils were more invested in their trans identity than the girls were themselves.
It does seem to me that there's more pressure on girls today to present themselves as an 'ultra feminine' stereotype - I'm talking about girls wearing full evening make-up to school with lash and nail extensions (a far cry from how things used to be).
I recall that when I worked in a certain school, some of the pupils were surprised that I was married to a man - this was based on the fact that I wore trouser suits and had short hair at the time.
I had been using 'Ms' as my title with my maiden name, but had switched to 'Mrs' and my married name after being in the school for a couple of years. My husband did a brief supply stint at the school, so the kids saw us arriving at work together.