Immediately, you will be able to use the Mini homepod as your TV speaker

Apple added an important feature for the smallest smart speakers, mini homepod through updates that allow users to use them as their TV speakers.
9to5mac reports that Apple launched update version 15 to the Mini Homepod which will allow users to pair two or more minists and use it as a TV speaker for Apple TV 4k.
As we mentioned in our review (here), Apple Homepodi Mini offers a pretty good, clear and hard sound output and pairing it with other minists will further improve audio quality for users.
That means, if you have some minis homepod in your home, they can be paired together to act as TV speakers.
In addition, updates also allow siri voice control through supporting homecide accessories.
Updates also bring some small improvements to Mini HomeEpod.
For example, the Mini homepod can now turn on / off the Apple TV, playback control or just ask for it to play a particular music path.
Here is a list of all changes brought by software version 15: the ability to use one or a pair of mini homepods because the default speaker for Apple TV 4K Control media playback now appears on the iPhone lock screen when the nearest mini homepod is playing music.
Option to adjust the lower bass volume to avoid disturbing others.
Siri voice control to turn 4K Apple TV or play movies or music lines.
Siri can now automatically adjust the volume based on the environment.
Support for detection packages with homepit videos