Making Screen Time actually hold
Apple's Screen Time is not broken. It is doing exactly what it was designed to do, which is trust the person holding the phone. The trouble is that you at nine in the evening and you at nine forty are not really the same person, and only one of them gets a vote.
Everything in this section is written for the same reader: an adult who set a limit on themselves, in a calm moment, and lost to themselves later. Not a parent policing a child. That distinction matters more than it sounds, because almost every page that ranks for these questions is written for the other one, and half of them are selling passcode crackers.
So none of this will help you get around a limit somebody else set on your phone. Every fix here needs the passcode, and if you do not have it, the right move is to go and have the argument rather than the workaround.
Where to start
Set it up properly once, take away the button you press most, learn where the remaining doors are, and know what to check when it stops firing.
The rest of it
How he does this bit
Scrappy's three rules map onto Apple's three tools almost exactly: quiet hours is Downtime, daily limit is an App Limit, and open limit is the one Apple never built. The difference is what happens when you hit one. Apple offers you a button. He does not have a button.
Or put a dog on the door.
Free to start, one whole rule, every safety rail. He does not know your passcode and does not want it.
Get Scrappy on the App Store