Screen Time on macOS is super broken it's insane. The "ask for permission" prompt when visiting a blocked website predates HTML5, and the web restrictions have a tendency to "fail open" after a few hours allowing everything to pass through. If you choose the approved-site-only option for a younger child, you'll get popups galore from the built-in apps phoning home and have to approve them all manually. I gave up fighting it and had to buy a 3rd-party solution because what's the point of a parental control that randomly stops working?

Fix it Apple, I beg you.