As you are running Bullseye, you may be affected by WARNING: Raspbian October 2021 release bullseye + unbound .
Run from your Pi-hole host machine, what's the output of:
sudo grep -v '#\|^$' -R /etc/unbound/unbound.conf*
As you are running Bullseye, you may be affected by WARNING: Raspbian October 2021 release bullseye + unbound .
Run from your Pi-hole host machine, what's the output of:
sudo grep -v '#\|^$' -R /etc/unbound/unbound.conf*