The Apple HomePod only supports a handful of third-party music services, such as Pandora and Deezer. Other services, including Spotify, must be streamed to the HomePod over AirPlay or Bluetooth. But the iOS 17 update is improving things a bit. Now, any streaming app that supports Siri voice commands can be played and controlled directly from the HomePod. You can tell your HomePod to "play Spotify," and it'll actually work.
Apple's HomePod Now Plays Spotify from Voice Commands
It isn't a native implementation of Spotify, but it works.
Siri is more responsive with a faster chip inside, but not necessarily more accurate. - Tyler Hayes / Review Geek