https://wccftech.com/download-tvos-15-3-and-homepod-15-3-software-updates-now-available/

tvOS 15.3 update for Apple TV and 15.3 software update for HomePod and HomePod mini is now available for download.

First and foremost, if you have the HomePod or HomePod mini, then you will be delighted to learn that Siri multi-user voice recognition is now available in more countries - English (India) and Italian (Italy). Up to six users are supported with multi-user voice recognition.