The table on this page seems to have a duplication in the row and they have a contradiction between row "Creating a cluster with multi-architecture compute machines on bare metal, IBM Power, or IBM Z" and "Creating a cluster with multi-architecture compute machines on IBM Power®"

I'm not sure but it looks like the content should be merged when the doc was updated from 4.14 to 4.15.

https://docs.openshift.com/container-platform/4.15/post_installation_configuration/configuring-multi-arch-compute-machines/multi-architecture-configuration.html