[Question] Istio Operator (CR) API version resources

Hey,

I have a question regarding Istio operator component and api custom resources it comes with.
At any documentation im seeing (Google or Istio) I can see only reference to Istio operator v1alpha1

I would like to know wether it is GA ?
When its expected to have a beta or final api release for that CR ?

Thanks,
Jony.