If your router is pfSense, you can use pfBlockerNG, installable from the default...

LeoPanthera on March 13, 2022 | parent | context | favorite | on: Smart-TV blocklist for Pi-Hole

If your router is pfSense, you can use pfBlockerNG, installable from the default repo.

If your router is OPNsense, you can manually configure a DNS blocklist. https://docs.opnsense.org/manual/unbound.html#blocklists Don't forget to enable a blocklist refresh entry in cron.