I am able to bring up cluster with the specified virtualization setting in install-config.yaml using openshift-install-linux-4.9.0-0.nightly-2021-10-05-004711.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Moderate: OpenShift Container Platform 4.9.0 bug fix and security update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.