Hi! Redfish does not have support for noop management: https://opendev.org/openstack/ironic/src/branch/master/ironic/drivers/redfish.py#L39 We need to add it upstream first, then backport. The patch you've been testing does not affect redfish.
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 (openstack-ironic bug fix advisory), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:4394