I think you were able to turn the setting on for this a fair while ago even if it didn’t support your region yet. Because I’m not on the beta and these started just working for me about a week and a half ago. I checked the support doc at the time and it didn’t say Australia yet so I was pretty confused.
Maybe I was part of some early A/B testing? It doesn’t seem like there was an OS update to enable it, I’m still on 16.5 not 16.5.1. The API probably updated and the app just processes that data for whatever regions it gets sent it for.