As with net-istio we need to:

a) backport to the midstream repo, now that upstream PR is merged: https://github.com/knative-sandbox/net-kourier/pull/862

b) enable the feature at the Knative operator upstream for versions 1.6+

c) enable the feature via the S-O (https://github.com/openshift-knative/serverless-operator/pull/1616) for 1.25