How to block Tiktok ? I listed many Tiktok -URLs, now Tiktok not working in browsers but Tiktok android app is working!

I want my browser's router tab to not log out. or, at least I want to extend the time I stay logged in. I need to be logged in in http://192.168.0.1/ 12 hours continuously

Can I set a custom page/message/warning for blocked website (by parental control or Access Control) or specified website? (instead of This site can't be reached DNS_PROBE_FINISHED_NXDOMAIN)

Archer c20 has whitelist mode in parental controls. But I need Blocklist. Becuase my whitelist is too big. I don't have time to write 150+ sites name!