I routinely have to drag our eldest two kids out of bed at 6.25am for breakfast in order for them to leave the house in time to walk to our local station to catch their 7am train to get them into town to walk to school in time for their lessons.
What would happen if you just let them get up and get to school on their own? They might be late initially, but I bet they would figure it out and be on time after a short adjustment period.
I think their problem is not actually the part about having to drag the kids out of bed, but about the kids needing to be up before 6:30a in order to walk->train->walk to school on time.
It does eventually settle into some kind of rhythm, although the agreement that they should not take their devices into their bedrooms at bedtime definitely helps with them actually going to sleep at a sensible time.
I'm an early riser, so it's not a problem for me.
For them, it's always been a challenge :(