sfx2000
Part of the Furniture
I was going to enable internet scheduling on my AC68U for the kids iPhones
Ok, they have iPhones - so if the WiFi don't work, the LTE will... and with Apple's "WiFi assist" feature, it'll jump automagically over to LTE if WiFi isn't working.
Couple of things to consider - maybe a Mobile Device Management solution - JamfNow, or even Apple's Configurator 2 if you're running a Mac - there you can have some granular policy control over the iPhones (and iPad/Apple TV as well).
Or just do it the old-fashioned way - homework/bedtime - phones go into a cardbox box on top of the fridge, with a fearsome penalty (not actually carried out, but something of value that would be deprived if a line is crossed)
parenting is hard work, technology makes it even more of a challenge.