No, but your OS needs to be configured to use the DNS server on your router. Easiest way to do this is with DHCP + NAT rule to ensure all DNS queries are processed by your router.
It’s not necessary but it ensures that all DNS queries are processed by your router. It could be that there’s software that uses a specific DNS server hardcoded to make sure they can avoid your Pi-hole (or alternative solution) to track you.
No, but your OS needs to be configured to use the DNS server on your router. Easiest way to do this is with DHCP + NAT rule to ensure all DNS queries are processed by your router.
Why do I need a NAT rule if the computer uses DHCP?
It’s not necessary but it ensures that all DNS queries are processed by your router. It could be that there’s software that uses a specific DNS server hardcoded to make sure they can avoid your Pi-hole (or alternative solution) to track you.