For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:psi-jack:network/openSUSE_Tumbleweed/home:psi-jack:network.repo
zypper refresh
zypper install lrzsz
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:psi-jack:network/openSUSE_Slowroll/home:psi-jack:network.repo
zypper refresh
zypper install lrzsz
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:psi-jack:network/15.6/home:psi-jack:network.repo
zypper refresh
zypper install lrzsz
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:psi-jack:network/15.5/home:psi-jack:network.repo
zypper refresh
zypper install lrzsz