Yes. But if she has the same issue with using a single sex shared facility I suspect the response would be to try and help her to manage her anxiety rather than to suggest that the toilets need to be reconfigured.
But the toilets are being reconfigured from what they were.
Seperate toilets have been the norm for a long time.
It provides a known and somewhat safe entity for a young person to deal with.
Now unisex toilets are being forced upon them and whether you accept it or not, going to the toilet in the company of the opposite sex can be an uncomfortable experience for many people especially teenagers.
So suddenly it's a new scenario they have to account for and why?
What's the purpose of it?
What's the benefit of unisex toilets?
Why change from the norm?

