Simple answer here - third bathroom facilities for “miscellaneous”.
Boy. Girl. Other. Easy peesy.
Yep. Or go the Canadian route, one large bathroom for everyone.
Really threw me a curve the first time I encountered that.
Very expensive for so many small businesses, but if states or municipalities want to impose that ridiculousness on them, so be it.
I am in hundreds of public restrooms every year and I haven’t seen someone in a wheelchair wheel into one in the decades since everyone had to install oversized restrooms for that potentiality.
Still, it is not the federal government’s job to involved in either or any of these propositions.