For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Simmphonie:yubico/openSUSE_Tumbleweed/home:Simmphonie:yubico.repo
zypper refresh
zypper install pam_u2f
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Simmphonie:yubico/15.6/home:Simmphonie:yubico.repo
zypper refresh
zypper install pam_u2f
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Simmphonie:yubico/15.4/home:Simmphonie:yubico.repo
zypper refresh
zypper install pam_u2f