For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Ximi1970:Cockpit/openSUSE_Tumbleweed/home:Ximi1970:Cockpit.repo
zypper refresh
zypper install cockpit-podman
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Ximi1970:Cockpit/15.6/home:Ximi1970:Cockpit.repo
zypper refresh
zypper install cockpit-podman
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Ximi1970:Cockpit/15.5/home:Ximi1970:Cockpit.repo
zypper refresh
zypper install cockpit-podman