How to get rid of fallback generated by networkmanager?

➜  ~ cat /etc/resolv.conf
# Generated by NetworkManager
search home
nameserver 127.0.0.1
# Fallback DNS servers
nameserver 192.168.1.1
nameserver 2a0x:xx04:4xx:xx00:xx:xxxf:fe40:bxxx

I’m setting up a pihole + unbound dns solver but See this fall back come again and again.

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