Transfer Audio to (and from) HomePod
If your HomePod and iOS device are running the latest firmware, you can simply bring your iPhone near the top of the HomePod to move your currently playing audio to it. Bring the iPhone close again to take the audio back.
Also, on HomePod, Siri can recognize your voice. If you’re having trouble with this, make sure all of your iCloud devices (and family sharing devices) are up-to-date.
Using voice recognition and Shortcuts, you can create home automations that are specific to you. For example, my wife and I can say “turn off my lamp,” and Siri knows which lamp each of us are referring to.