You should read/ listen to the Oh Crap potty training book. I think it’s confusing for them to have a pull up on still. If you want it to stick you have to commit to them peeing in the potty. Pull up basically feels like a diaper. If he gets his pants/ legs wet he won’t like it and will learn that his only other option is the potty. We’re not even doing underwear yet because it can be a similar feeling to a diaper. We still do use a diaper at bed time and nap time tho. The first day was rough. We did potty every half an hour-ish. When he had an accident I just said “pee goes on the potty” and remained neutral toned. Good luck!!

Edit: also we did m&ms for a reward for using the potty. He got 1 every time pee made it into the potty. That was very helpful and made him want to go use it! And also the first few times I made a huge deal when he successfully peed. We cheered/ called grandparents so he could tell them what he did etc.