I’m still an iTunes Match only subscriber, and one of the things that drives me bonkers is how you can’t manually queue up songs on a HomePod using an iOS device. Not Airplay-ing songs, but having the HomePod do the playback.
Probably this voice plan wouldn’t enable that ability, but I can dream.
Do Apple Music, ditch Match. You can manually queue on HomePod from iOS. I did it just tonight.
In Music, tap the bottom bar with the play controls on it.
In the new view, tap the airplay icon
Then tap "control other stuff" (this is the key!! Don't be fooled and tap the airplay to HomePod).
Then tap your HomePod at the bottom (usually).
Now you're controlling HomePod only. While in this mode, any "play next", "play later", etc. is on the HomePod.
Similarly, you can get this from control center, too. Open CC, long press on the same airplay icon. Then do same actions.
This is good for when your iOS thing lost its mind and can't see HomePod anymore, yet HomePod is still cranking out the tunes. Do the CC+long press method, tap Control HomePod, and boom! You reconnect like usual, play controls, and you see the up next list again.
Enjoy!