For openSUSE Factory zSystems run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jbohac:branches:Kernel:kdump/openSUSE_Factory_zSystems/home:jbohac:branches:Kernel:kdump.repo
zypper refresh
zypper install kdump
For 15.7 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jbohac:branches:Kernel:kdump/15.7/home:jbohac:branches:Kernel:kdump.repo
zypper refresh
zypper install kdump
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jbohac:branches:Kernel:kdump/15.6/home:jbohac:branches:Kernel:kdump.repo
zypper refresh
zypper install kdump