New Technology brings additional responsibility to parents. I for one did not wish my eldest to go onto Social Media but they gave in to peer pressure. It is like the story of a friend of mine who refused to buy GTA for their son, so the son went to their friend's house to play it.
So what do we have at our disposal? Zorin OS 18 has the child safety app which is now a menu item whereas in 17 you had to use the terminal.
What other options are available?
OpenDNS is available for parents to exclude sites being accessed by their children which can be a global setting of site types and also specific sites.
Lastly, choosing the correct mobile device. I was pleased to see that Murena has made great inroads in this regard so any parent wanting to purchase a mobile phone should either go for non-smart brick phone or choose a Murena Fairphone device which will be a lot cheaper and more secure with Child safety in mind, but ensure it comes with /e/OS 3.x: