No.
Surely having the same uniform as the gender they assign to themselves is what they aspire to not to be the same as everyone?
But my children's school has a no skirt policy. I understand it is for ease of enforcement and was, I believe done with consultation from the kids.
Skirts/dresses in schools for the kids in my immediate area are only worn by infants. The juniors and seniors have a trouser only policy and have done for a number of years.
I would be interested to see how many kids are transgender in these schools. Are they catering for one or two, tens, hundreds in an academic year?
We seem to be catering more and more to the minority as if their views, wants and needs out weigh those of the many.
But TBH this sort of policy does no harm because girls often find it more comfortable and easy to wear boys cloths. My own daughter wears boys shoes and trousers to school. It took me all my powers of persuasion to get her to wear a girls blazer. In the end it was about how it fit to her girl shape than anything.