I found a belt that fastened with velcro we put it tight around the top of the pants with it fastened in the back making it difficult to get into his pants and pull up.

To be honest just know that she will grow out of it when she’s ready… otherwise all you can do is check the time that she poops everyday and watch her till she’s done..

Something like this

My husband and I learned from watching a YouTuber to get our daughter whole body zip up pajamas. And put them on backwards so that she can't play with the zipper to get into her pull up