Setting Multiple Playback Destinations via Shortcuts?

Alright @RosemaryOrchard, I am looking t you because you could probably solve this easily.

I simply want to create a Shortcut that gives me a list of all my Airplay speakers a-la Set Playback Destination does, let’s me choose which ones I want to play through, and then play music to those.

No matter what I have tried, I can only seem to choose 1 speaker. Is there a way to choose multiple, or even better a HomeKit Zone? This has to be easier that I am making it.

Love some help! Thanks Rose or anyone!