Ooh, you're back.
I still have questions.
Nobody cares if any boy likes Barbies and wants to wear a wig.
It doesn't make him a girl.
Nobody cares if a boy thinks he knows what it's like to be a girl. It doesn't mean he DOES know what it's like to be a girl nor does it make him a girl.
Nobody cares if a boy is attracted to other boys. It still doesn't make him a girl.
Thinking he knows what it's like to be a girl, liking Barbies and long hair, and being attracted to boys, don't change his body and don't mean that other girls should have to put up with him in their changing rooms.
They don't mean that he's a threat, or any more of a threat than any other boy, girls are still entitled to single sex changing rooms.
As well as girls' rights to single sex spaces, we also care about boys like this one*. We care that they've been lied to - that they've been told they can go through female puberty - that they've been told that they will be "just like another girl/woman" when they grow up - that he's been told it will be easy to have children via surrogacy - that they've been told that puberty blockers and cross sex hormones are healthy for their growing bodies.
*I'M DOING MY BEST NOT TO MAKE THIS ABOUT ONE CHILD.