Virtual package resolvconf is provided by:
dpkg-query: no packages found matching openresolv Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend ||/ Name Version Architecture +++-================-================-==================================== ii systemd-resolved 252.23-1~deb12u1 amd64 systemd DNS resolver 1 packages