How to potty train boys?

I’m hoping to get tips on potty training a toddler from fellow moms. I have 3 boys ages 13, almost 12 and 3.5. There’s such an age gap I honestly don’t remember how I went about potty training with the first two. He is a stubborn little guy too, he knows exactly how to use his potty and will do it no problem, if I ask him to. He will not do it on his own, he won’t tell me when he’s wet or when he’s got a dirty diaper. It’s driving me crazy! He has his own little paw patrol potty and one of the ones you put on a regular toilet in case he didn’t like the other one. He’ll use both no problem, but once again only if asked. Any good tips on potty training this boy?!