Request to enable MaxUnavailableStatefulSet featureset on feature gates

Custumer trying to set StatefulSet spec .spec.updateStrategy.rollingUpdate.maxUnavailable
According to the doc  [1]" This field is alpha-level and is only honored by servers that enable the MaxUnavailableStatefulSet feature."
From [2] i can confirm MaxUnavailableStatefulSet is an Alpha feature.

Tried to enable the feature using featuregate   [3] and it fails with

Error : "Unsupported value: "MaxUnavailableStatefulSet": supported values: "", "CustomNoUpgrade", "IPv6DualStackNoUpgrade", "LatencySensitive", "TechPreviewNoUpgrade"" for field "spec.featureSet".
 
Can we get this featureset available in the future release , as it need to be set true to get the StatefulSet spec .spec.updateStrategy.rollingUpdate.maxUnavailable working

[1] https://docs.openshift.com/container-platform/4.11/rest_api/workloads_apis/statefulset-apps-v1.html
[2] https://kubernetes.io/docs/reference/command-line-tools-reference/feature-gates/
[3] https://docs.openshift.com/container-platform/4.11/nodes/clusters/nodes-cluster-enabling-features.html