What time is your 15yo going to bed? Mine is constantly exhausted - lights out 1030 but he gets up 645 on school days (he doesn’t leave the house until 8 but wants to get up early).
It’s the major battleground between us and it’s hard seeing him like a zombie. He insists on not going to bed earlier and I think he does struggle to sleep earlier. No phone in his room usually…
Any ideas?