For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cahu:security:SELinux:1236671/openSUSE_Factory/home:cahu:security:SELinux:1236671.repo
zypper refresh
zypper install selinux-policy
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cahu:security:SELinux:1236671/15.6/home:cahu:security:SELinux:1236671.repo
zypper refresh
zypper install selinux-policy
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cahu:security:SELinux:1236671/15.5/home:cahu:security:SELinux:1236671.repo
zypper refresh
zypper install selinux-policy
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cahu:security:SELinux:1236671/15.4/home:cahu:security:SELinux:1236671.repo
zypper refresh
zypper install selinux-policy