OK, thanks for that info. Luckily, I finally guessed it correctly (a VERY obscure personal number from 20 years ago--what was I thinking?)! Now, what do I need to do to get it the way it is in that article with the ID associated with it? I am logged into my Mac with my ID and have family sharing set up with a child account (the one in question). Do I need to disable it and then restart the screen time from scratch? I didn't have family sharing enabled when I started screen time initially so maybe that is it.
And are the settings global? If I disable on one device is it disabled on others? Or do I need to go to every device and disable and then re-add it? It is hard to know what is affected by a given change on a given device.