=bullseye-updates, origin=Debian,codename=bullseye-proposed-updates, origin=Debian,codename=bullseye,$) regexp to find kernel packages
Using (^linux-.*-5\.10\.0\-8\-amd64$|^linux-.*-5\.10\.0\-8$|^kfreebsd*-kernel-5\.10\.0\-8$|^linux-.*-5\.10\.0\-8\-amd64$