Child undressing in the night

I am at a loss. My 2.5 yr old is constantly taking off her clothes and diaper. We’ve tried potty but she doesn’t seem ready or understand yet. She just likes taking off her clothes. She sleeps in a onesie now to try and contain her but she figured out how to stretch it and get it off. I keep having to go in her room once I put her down and it’s a million times a night. Any advice? How to I keep her dressed? I feel like we can’t at this point ugh I’m super frustrated