Expend his energy (more play time) and routine. Right now the routine is you guys lay with him for hours. Also make sure both parents spend at least 15 min of quality time (no screens, playing what he wants) with him in the evening. It’s going to take some time to get him straight with a new schedule. Best of luck!

7 and 10 for us, they have our old phones pretty locked down. They can use Libby unlimited for audio books or normal reading, music, learning games. For free time the can play games sometimes but we monitor that pretty good. They are set to lock at lights out time and unlock again in the morning. It’s worked out pretty good for us so far
Lay down next to them and wrestle tickle?