Need help wording a phrase to make it more LGBTQI+ inclusive

Hi guys, so I'm currently writing a website for my local community pool and I'm stuck on a couple of sentences about the bathrooms. It currently says something like "The x pool has bathrooms for both sexes. Note: children over the age of 7 are not allowed in the opposite sex bathroom.". Is this ok or is there a way I can word this to make it sound more LGBTQI+ inclusive without changing the facts and rules? thanks guys.