I had a good handle on my kids online habits until covid hit. Once they transitioned to fully online classes, they got used to longer screen times and internet

I had a good handle on my kids online habits until covid hit. Once they transitioned to fully online classes, they got used to longer screen times and internet access. I have installed Qustodio to block and monitor their internet habits. But my 12 year old somehow figured out how to unblock herself from Qustodio, but things are blocked on my younger one's laptop. Every time I restart the laptop, sites are blocked for sometime, she does something again to unblock herself. So I had to manually block a bunch on in appropriate domains that I am aware of via /etc/hosts. I think once kids grow up (11y+ in my personal case), they don't like us to know what they are doing online. They wouldn't want you to be around when they chat with their friends etc. But whenever there is an opportunity I try to tell them about the bad that happens online, not share their personal information, addresses, pictures online, monitor the sites they visit and block if they are inappropriate.