That is not the way middle schoolers are wired. Their circadian rhythms are jumbled, just like a lot of other things going on in their bodies during this transition time (from childhood to young adults). They are wired to naturally fall asleep around 10PM - 12 midnight, and rise nine to ten hours later. Their brains start processing information an hour or so after rising.
Then, around age 16, things start settling down again, and the early to bed, early to rise adage holds true.
IMO, homeschooling during the middle years, when a family can adapt to the needs of the individual, is the best plan. I would rather not fight a battle over a self-limiting condition.
Horse cookies, kids can’t go to sleep because they do nothing but play video games, text or look at memes. It may seem like it is not possible, but in Middle school when I was there, my parents had me going to bed by 8:30 and we went to sleep within a half hour. Up at 7, walk the 20 minutes to school on regular days. Or on basketball mornings, would leave at 6, walk to school, play a shortened game, then classes, then a PE class. After school, basketball, or baseball, or riding bikes. Football without helmets.
I see kids now, they only thing they exercise is their jaws. Either talking, or eating. Judging by the shape they are in, mostly eating. School would be better served having a boot camp with mandatory attendance. Get the kids in early, and work them out for an hour before every day. They will learn then, and not how to sleep in and be a schlub.