For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/isv:SUSE:Edge:metallb/15.6/isv:SUSE:Edge:metallb.repo
zypper refresh
zypper install frr-k8s-008
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/isv:SUSE:Edge:metallb/15.5/isv:SUSE:Edge:metallb.repo
zypper refresh
zypper install frr-k8s-008
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/isv:SUSE:Edge:metallb/15.4/isv:SUSE:Edge:metallb.repo
zypper refresh
zypper install frr-k8s-008