Help with potty accidents....

I feel so bad for my little boy :( He’s 7, and is still having accidents in his pants. Both kinds. When he has them at school, it’s because he’s embarrassed to go there....and when he has them at home it’s almost like he gets too engrossed in whatever he’s doing and doesn’t even realize he needs to go until it’s too late. *sigh* Anyone ever dealt with this? I don’t want to punish him for that....maybe positive reinforcement? Idk. ☹️