I’m not asking them to be in the toilet with her, I get that is too much but the toilets are in the same room and she’s been locked in before so I don’t think I am asking too much.
I think maybe let them know if she’s in longer than 5-10 mins ask them to check on her because she has previously been locked in as that’s a concern
Considering the staff to child ratio, I believe it’s 1 to 8 for that age, I think you are asking too much. Especially if the toilets are outside of the room, they would be forever in the toilet.