My current pairs are made by Classroom Uniforms. They have sizes from kids to adults and a larger rise than normal. I find that a lot of other pants have smaller rises (not good for diapers), and I hate crotch-tight pants. They only have 2 front pockets though and no belt loops.
The main downside to me is the lack of a sewn in fake fly. I love those. It just says to me you’re a big boy, but you’re not. You don’t need that hole to go potty because you’re in diapers, and little toddler you wouldn’t be able to get it open in time anyway.
I had some boys cargo pull on pants from Kmart, but those started falling apart in the wash. Unfortunately they don’t make that design anymore and replaced it with a drawstring variety. It was almost perfect in every way.