If you look into the history of the treatment of intersex children you will find lots of information on how the understanding of gender identity has influenced treatment protocols.
I have jj1968. Much of this "understanding of gender identity" derives from and is rooted in the horrifically inhumane experiments John Money did on the Reimer twins. I'm astounded you would refer to what people with DSDs call a human rights violation as some kind of benign emergence of understanding.
And they still get it wrong quite often which is why intersex groups universally support Self ID.
This is doubly incorrect.
First of all, only 2 in 1000 babies are born with ambiguous genitalia requiring specialist input to ascertain the sex of the child. In one in 20 of these children, the results are inconclusive and sex is assigned after consultation with specialists and the parents' child. (Usually based on anticipated later development and practical considerations, but parents are told that this is an educated guess and may not work out for the child.)
One in ten of these children later decides that their sex assigned at birth does not represent the way they see themselves and change their sex. (Not via a GRC, but a different mechanism, because this is a different issue from healthy people who wish to legally change their (wholly unambiguous) biological sex.)
This amounts to one person across the whole of the UK every two years.
Percentage wise this means that 95% of children born with ambiguous genitalia have their sex determined through medical investigation, 5% have it assigned and 0.5% later decide this assignment is wrong for them. I would not call that "quite often". Especially when you look at the absolute numbers.
And second, what people with DSDs are asking is to allow children whose sex is ambiguous to decide for themselves whether they wish to undergo corrective surgeries or not and only when they are ready to understand the consequences.
That is not support for legal self-declaration of sex for people who have no DSDs. Which is why a number of their advocacy organisations have repeatedly demanded not to have their complicated medical histories co-opted in aid of a group who don't share their medical conditions and who advocate for ever younger children to undergo medical procedures whose consequences they cannot understand.