My 16yo's gaming is out of control and I don't know what to do

This is getting ridiculous. He's grinding through Valorant and Fortnite pretty much every hour he's not in school or sleeping. I know some gaming is normal but this feels excessive. He's still maintaining decent grades (B/B+ range) and isn't failing school, but his sleep schedule is destroyed and he's basically antisocial with the rest of the family now. Tried talking to him about it and he just says "all his friends play too" and "I'm fine." I'm not trying to be the overbearing parent but something feels off. Any of you dealt with this? How do you even enforce limits on a 16yo who can technically override most parental controls?