All this hoopla over who is allowed- or required- to shower with whom!
No, I wouldn't want my daughter to be in a communal shower with anyone she felt uncomfortable being around. Male, female, or Other. But, this is where collectivism leads.
You could eliminate the appearance of a problem by getting rid of "boys" and "girls" bathrooms and showers, and just having restrooms and showers with no gender designations at all, but that isn't (to me) a good solution at all.
Better would be getting rid of government schools- the fountain of collectivism- which is where things like this become an issue. You don't see invented issues like this in the real world. Abolishing kinderprison is striking the root instead of worrying about the shadows the leaves cast.