For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:infrastructure:ipsilon/openSUSE_Tumbleweed/openSUSE:infrastructure:ipsilon.repo
zypper refresh
zypper install freeipa-client
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:infrastructure:ipsilon/15.5/openSUSE:infrastructure:ipsilon.repo
zypper refresh
zypper install freeipa-client
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:infrastructure:ipsilon/15.4/openSUSE:infrastructure:ipsilon.repo
zypper refresh
zypper install freeipa-client