Yeah, having a biological boy in the girls changing room definitely sounds like a safeguarding issue. Even having a shared bathroom with separate cubicles can be a problematic situation for some parents (and the kids themselves)
Also seems weird you say youâre close to your brother/sister. Saying he was gay in your profile. But didnât sound like you knew they felt like a girl đ¤ surely would have been a girl at home, or done something to talk to you, and felt this for a while, before they started transitioning (what ever is allowed where you live as rules and feelings on puberty blockers and hormone treatment at young age are seriously different everywhere)