Also noticing the same, I have imported errata also from the same steve-meier source into a new repo centos7-errata which is in my Product named Centos7.
I can find the latest polkit errata from centos mailing list [CentOS-announce] CESA-2022:0274 Important CentOS 7 polkit Security Update in the Centos7 → Centos7-errata repo in katello. If I select the errata it shows me I have hosts this is applicable to, and I’m redirected to the content page listing those hosts.
The applicable package is installable on those hosts, but that list of hosts shows no security errata available.