The bare metal operator is installed by default on all platforms but is not enabled.  We need to clarify this in the documentation, as well as describe how to enable it.  Instructions for that can be seen in this blog post:
https://cloud.redhat.com/blog/multicluster-engine-and-assisted-installer-integration-deploy-and-expand-clusters-easily see "Enable the Bare Metal Operator (and Metal3)".

Please Dev team/QE open a doc issue for us when this is confirmed and we have draft procedure.