It sucks, but as things are those are the options for them. Either less sleep and more free time or cutting back on free time.

One does not simply “go to bed” when your brain is simmering in hormones.

Worked for us during camp. Took a while to get to the rhythm but worked. Dunno if it’s an actual thing that teenagers have to sleep on a schedule where they have to stay up late. If so, sucks, then they got no choice.