Turning off the kid’s SSID is a reliable way to call them to dinner, according to my neighbour. Yes, the teens have already volunteered to install a remote router on my unlimited fast internet to prevent interruption, but I have declined on security grounds, not helicopter remote parenting hypercontrol grounds.
Make sure you have a tested backup of your main router configuration and it is locked away. Resetting everything to factory is not beyond the capabilities of a young child. They set up the SSID with no security and all your network is wide open.
Buy them a push-button 30 minute egg timer. Teach them self responsibility and that all decisions have consequences, and you are well on your way to having responsible adults that don’t rely on you to assist in controlling their lives and being wholly dependent on you, boldly facing the big nasty world, brimming with self confidence.
You cannot outsource parenting, or automate it. Lots of hugs can assist.
Have you seen the discussion here from another parent?