I've lived in Sweden for a while and they have lots of really large single stall unisex toilets (with proper walls, very private) with all kinds of facilities (place to change babies, handles for wheelchair users, condoms and tampon dispensers...) to accomodate everybody. Never experienced this as a problem. More like a luxury in fact. This setting is mostly used in restaurants, cafes etc. where traditionally there would hardly be space for two seperated tiny, tiny separate sex bathrooms and the wheel chair users had been left out, just like anybody who needed to change a baby.

Classic barely walled off common facilities for everybody: not my cup of tea and would not want that in schools etc. either. I hardly feel comfortable using those with other women.

Locker rooms should offer a separate small room for anybody trans (e.g. separate facilities for the disabled or adult coaches of kids, most gyms have something!). I understand trans women/trans identified males not wanting to shower and change with men, especially if they have transitioned medically (partly of fully). But I als don't want the pre-op and the dangerous ones in the women's and since there is no way to tell the difference between the save and the dangerous post-ops a different solution must be found.