For openSUSE Leap 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:Appliances:Images:Testing_s390:leap/openSUSE_Leap_15.6/Virtualization:Appliances:Images:Testing_s390:leap.repo
zypper refresh
zypper install ibm-se-revocation-lists
For SLE 15 SP7 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:Appliances:Images:Testing_s390:leap/SLE_15_SP7/Virtualization:Appliances:Images:Testing_s390:leap.repo
zypper refresh
zypper install ibm-se-revocation-lists