A lot of internet filters and tech restrictions are arms races with your kids (in my experience anyway). My DS (8) could get around the Google filter using some kind of command prompt thing when he was 7 and my DH had to build a bespoke internet filter that sits on a raspberry pi.
The DC have a totally different network to us and it operates on a white list with a bot that messages us asking for access to a website - there’s different options for yes/no, allowing access to the whole website (ie the whole of bbc vs just the bitesize bit) and “just for now” or “forever”. Also a special function for YouTube videos because there’s so much junk on there but also so much valuable stuff. DD is working through a multi-video sketching tutorial atm but I don’t want them watching hours of unboxing videos or Mr Beast walking on hot coals to win a car or something.
DS also watches a lot of coding tutorials like the Coding Train but it’s probably a matter of time until he works out how to get around it again. In year 9 DH managed to get access to every teachers email inbox (but he did report the vulnerability to the school who reported it to the third party email client they had purchased - turned out to be a flaw in all of their systems across all the businesses and schools they had as clients).
We are not anti-tech and our kids are pretty proficient with computers (especially DS who could probably do all of the coding bits of a GCSE in computing atm in JavaScript or Python).
DD has gone on a scout camp this weekend and didn’t even take her brick phone, I would like to ask if she was cold last night but I guess it will need to wait until Sunday afternoon when we pick her up…