Are they getting enough sleep? If they need an alarm clock, they aren’t. I was surprised that less than 20% of 12th graders in our large metro county report getting 8 hours on school nights. The AAP recommendation is 8-10 hours a night for ages 13-18, that’s just flights less than the 9-12 hours for ages 6 to 12. Deep sleep can be enough to survive but it’s not enough to thrive (for most people).
Probably occasionally sleep deprived. If you have a tournament today and a school project due tomorrow then sometimes you have to sacrifice a little sleep. It's not ideal but it's part of learning time management and how to operate as an adult in the real world. There are always trade-offs.