Did "Preferred Home Hub" make it into iOS 18 / HomePodOS/tvOS 18 stable release?

I remember seeing reports during the iOS 18 dev and public betas about the ability to choose a "Preferred Home Hub". My searching prior to asking this question reveals lots of articles dated prior to September. To use a single example, reference The Verge's article [Apple gives Apple Home users something they’ve been begging for](https://www.theverge.com/2024/6/14/24178482/apple-home-ios18-preferred-home-hub) . In this article they embed media from Reddit, whose image shows a screenshot of the ability to disable Automatic Selection and choose a single Hub to prefer as the network head: As of just before writing this question I updated my last AppleTV to tvOS 18. It came back from "Not Available" status to "Standby", but my "Home Hubs & Bridges" section appears unchanged without the new options. I do have some third party accessory bridges, but all of my Apple-brand devices should now be fully up to date on iOS 18. Yet, there is no change to my "Home Hubs & Bridges" screen: I've checked settings everywhere in the Home app as well and I do not believe there is any other section this is relevant. Is there something else I have to do to enable the option to disable automatic Hub selection and choose a Preferred Home Hub?