Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:tlusk:devtools/15.6/home:tlusk:devtools.repo
zypper refresh
zypper install eza
Para 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:tlusk:devtools/15.5/home:tlusk:devtools.repo
zypper refresh
zypper install eza
Para 15.4 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:tlusk:devtools/15.4/home:tlusk:devtools.repo
zypper refresh
zypper install eza