Lockable doors, walls that go all the way down to the floor to stop people peeping, wire-mesh roofs, etc. are all an admission shared-sex spaces don't work.
Exactly.
The OP wants to target individual places. Make sure there are floor-to-ceiling cubicles, no possibility of getting a phone in, under, over, or slipped through a gap in the door, etc.
So basically turn a changing into a fortress to protect the women that are already protected by it being single sex.
The first question to ask is why? Why does mixed sex conclude that you need to be locked in your own individual pod?
Could it be because of the risk?
And the second question is, who is this supposed to benefit? Because it certainly ain't women or children. Or the management. Or the owners.
Just a handful of men and all predators.
So yes, in the words previous posters, the answer is no.
NO.