need to do to talk to your son more to see if he can provide more insight into why he isn't interested in school.

I really, really, really like this quote..

"Many people think they lack motivation when what they really lack is clarity."

- James Clear - Atomic Habits

Is your son struggling with some sort of undiagnosed mental health issues? ADHD, anxiety, depression, etc.?

Does he get enough exercise daily? If I could go back in time I would've told my parents to let me go workout in the morning instead of doing early morning seminary.

I've done early morning workout while I was in the military and still did after getting out and it's definitely plays an important part of me having a successful work day.