This one just kinda blew my mind. I noticed the familiar "cast" icon at the lower-left of the Pandora app on my iPad, which is a Google thing and looked out of place on an Apple product. When I pressed it I saw the Google Home in the master bedroom and the Google Home Mini in my home office. I selected the former and a couple seconds later music is playing on the Home. I suspect this is somehow all delivered "in the cloud" and not something Apple can control. I think I like this cloud thing. It helps them all play nice together.