With SRVKS-33/SRVKS-34, knative-serving-operator requires permission (or cluster-admin role) in order to obtains network parameters. It appears that knative serving controller does not have the permission at the time knative-serving-operator installing knative. The following error is observed in the serving controller's log.
reflector.go:134] sigs.k8s.io/controller-runtime/pkg/cache/internal/informers_map.go:196: Failed to list *v1.Network: networks.config.openshift.io is forbidden: User "system:serviceaccount:knative-serving:controller" cannot list resource "networks" in API group "config.openshift.io" at the cluster scope