I think she is not ready to stay potty training yet. Maybe you want to hold first. Grab books about toileting may help the toddlers understand better
I apply for my 2 month old baby each diaper change for prevention. Just a very mild thin layer will do and I don't use those strong kind of cream.
I never potty trained my kids. When they are ready they will tell you. It's less stressful that way
https://sg.theasianparent.com/the-when-and-how-of-potty-training-a-toddler-find-out-the-basics
She will get use to it gradually
😂