Hello @lig and welcome to the Community. Please read the stuff in #start-here category when you have the time.
Well. I think you are fine with the fact that Fedora 33 is still pre-beta, so it is difficult to find support here. In addition, bugs are expected.
As a rule of thumb, you should install Rawhide, pre-beta and beta releases only if you want to participate in bug hunting
However, GNOME is composed by different pieces. Each piece could be a different package (i.e. the new GNOME Tour app, GNOME Maps, GNOME Web aka Epiphany, etc.) developed under the GNOME umbrella, but not a core part of the desktop environment. Like any package, a software could be installed by default or not in the distribution. In the same way, the distribution maintainers can decide as well to include or not some GNOME functionality.
In this case, if I’m not wrong, the parental control package is called
However, as far as I can see, it is not packaged for Fedora 33. And as far as I can understand, probably, correct me if I’m wrong, GNOME 3.38 includes the initial support to this feature, but probably we need to wait the next release of Fedora (34) to see it enabled.
Here you can find a discussion if Fedora should make use of
malcontent in the default install https://pagure.io/fedora-workstation/issue/186