At some point you should give them some more freedom. That’s very restrictive on the connections they can make with their peers as they won’t learn the cultural norms.

You’re not benefitting them in the long term, they will be stunted in their grasp of the Internet, which is very important in today’s landscape. They will also go behind your back to access the internet with NO restrictions rather than you being able to block some of the worst stuff and letting them access normal stuff.

Granted if they’re under 10 that’s fine, but consider opening up as they get older.