In which stage is Auto-MTLS?

Hey all!

Automatic mutual TLS was an Alpha feature in Istio 1.4. In which stage is this feature in Istio 1.15.2?

I would not find the information in the istio documentation.

Thank you!

This is on by default and a stable part of Istio core.

Thank you @howardjohn. Do you know where can I find the documentation?