Something happened with my local network connectivity that caused my homelab DNS server to not be prioritized on my remote desktop VM. I configured this by running sudo resolvectl status and found the gateway to be the current DNS server. A reboot did not fix the problem. Found that /etc/resolv.conf had the line "# This file is managed by man:systemd-resolved(8). Do not edit" and therefore edited /etc/systemd/resolved.conf and then ran sudo service systemd-resolved restart. I expect the DNS settings to survive a reboot. Source#