So ... if “Mary” of nursery-rhyme fame were to bring her little lamb to school on account of said lamb identifying as a boy ... would that no longer be against the rules?
Equity is equity. No exceptions.
After all, schools now-a-days strive for diversity.
How much more diverse can a classroom be to have a mixture of girls, boys, trans, cats born girls, cats born cats identifying as a girl, and a little lamb identifying as a boy.