How are children expected to be on top of their game when they don’t get enough sleep?

Hello everyone! I’ve always been a big advocate for children getting the recommended amount of hours of sleep as much as possible and following the recommended wake windows with age etc. I have seen this do wonders for all of my children and they are much more alert, well mannered, having more self control etc. So basically how is it possible for my kindergartner to be his very best self when school no longer makes it possible?We stay in the outskirts of our town so we are about 30 mins from the school. We wake him up about 6:30 to get him there around 8:00am. In order for him to be getting enough sleep we would have to lay him down for bed at like 5:30 every day which is just not logical. He gets out of school at about 2:50, we get home at about 3:20. If I were to lay him down that early we’d be eating dinner and starting bedtime routine as soon as he walked through the door. No time to go over what he’s learning at school like they ask us to do every night. No reading for 20 mins like they ask us to do every night and no family/quality time whatsoever that isn’t school related. They have a rest time at school for 30 mins but that’s about how long it’d take for a young child to get comfy and actually fall asleep. I just don’t understand… My son comes home exhausted every day and is having trouble being still due to not having as much control over himself from the lack of sleep. Showing similar symptoms to adhd but we know this isn’t it. He is simply not getting his normal amount of rest and we see a clear difference when he does.

How do you all do it?? How do you get them to bed at a decent hour while still having time to spend as a family?? How do you help a child who is very sensitive to rest? I want him to be his best self and flourish but it seems school schedule makes this difficult to do.