Are you sure systemd overwrites it? I believe it maintains its own /run/systemd/resolve/{resolv,stub-resolv}.conf file, and it's up to you whether you want to s

Are you sure systemd overwrites it? I believe it maintains its own /run/systemd/resolve/{resolv,stub-resolv}.conf file, and it's up to you whether you want to symlink /etc/resolv.conf to one of these or not.