This pervasive desire to block, protect, monitor, and control your children's online activities through nebulous supervision tools seems like a particularly American solution to a particularly American problem. Much like how little Timmy simply can't go out to play without a GPS anklet and an air tag behind each ear, so too can't he go online without a supervised account on a supervised device on a supervised connect…
It's fine and well to say the solution is to just be around more or take an interest in what they're doing, but that is hard to do with full time jobs, multiple kids, etc. Parental controls are supposed to exist to let the parents let their kids explore in a safe space. It's not about constant supervision or tracking, its more akin to hiring a babysitter rather than leave your children home alone.