Anyone else?

I’m at a lost. My son wakes every night and is awake for hours. Sometimes he’s upset sometimes he’s not. It’s getting to the point now where it’s affecting our lives everyday. He always wants to sleep in the day and just mops around as he’s got no energy from being up all night. Everyone else is doing lovely things with their kids as I feel we try and fail as he’s always tired = grumpy. He will either fall asleep if we go out in the car or just be awful if he doesn’t. If he does sleep through he will do 10 hours no more so when he doesn’t sleep he could be having anything between 7-9 hours a night which is just ridiculous. He attends nursery 3 times a week and you’d think that would tire him out but no! We’ve been out this morning to a play group and he wouldn’t play just sat next to me the whole time whilst I’m feeding my daughter or getting her sleep. Got home and still won’t play anything or general do anything he just wants to lay about or go sleep! I’ve tried all sorts, let him sleep, keep him up, bed earlier, bed later, bath salts, vitamins, he has no screen time with us (hasn’t for years), eats well doesn’t have junk food or sweets, so much connection time. Anything you name it. Not sure what I want from this post really but I thought by nearly 4 years old he would sleep a little better and engage in playing more. I couldn’t tell you his favourite toy or something he absolutely loves as he just doesn’t get into anything that much. I just can’t help think what’s wrong with my child 😭😭