Still wetting the bed at age of 10

I need some advice! My husband and I have guardianship of his two younger sister. (It’s a long story) One is 11 and the other is 10. The younger one still wets the bed a few times a week at least. She will have her good weeks too though.

A little backstory: My husband potty trained her when she was very young. There was issues with their mother so they didn’t see her for a while. About a year or so later, she saw her mom and that night she started wetting the bed again and she hasn’t stopped since. Is there any advice or products or anything that someone could recommend. It would be greatly appreciated!!