Whoopsie - I totally forgot to mention that I have an iPhone 7 Plus and a 2015 MacBook Pro. I happen to have bought a few Kasa Smart Plugs and use Home on my iPhone and my MacBook to control the Smart Plugs. Very neat and it even seems to work as expected.
Although I was very disappointed to find out that the Apple HomePod mini lacked bluetooth connectivity - I have high hopes that the following will work to hear audio:
2015 MacBook (Monterey) >> Safari (v 17.6) >> AirPlay >> HomePod mini
Another use case would be this
2015 MacBook (Monterey) >> QuickTime (v 10.5) >> AirPlay >> HomePod mini
If AirPlay turns out to be a hassle or an utter failure then I can use the HomePod mini for remote access to my Kasa Smart Plugs (i.e. I'm miles, and miles, away from my home and want to turn lights on/off using Home on my iPhone).