In the OCP docs for installing OCP on IBM Z, in the "Collecting debugging information" section, it asks the user to oc debug into the node to execute the dbginfo script: https://access.redhat.com/documentation/en-us/openshift_container_platform/4.8/html/installing/installing-with-rhel-kvm-on-ibm-z-and-linuxone. This script : https://github.com/ibm-s390-linux/s390-tools/blob/master/scripts/dbginfo.sh is part of the s390-utils rpm package included as part of RHCOS and collects system related information on a Z system.

But the user should not be required to go into the node and run a script. the collection of this information should be made a part of the must-gather and the installer gather (for debugging bootstrap failures through installer).