I suspect that most delivered the afternoon paper which is most likely extinct. Morning papers are off the press by 5:00 AM and expected by 6:00 or 6:30 which would be tough on school days.
My entire three years of delivery papers was in the morning. Like I stated, the papers would arrive on my porch around 5am and I’d have them delivered by 6 and no later than 6:30. Plenty of time to get to school. But yes, I did have to hit the sack by 10 most nights.