Misunderstood Capabilities???

[jz6pwc]

I believe I may have misunderstood what this app would allow me to do. I have a Sonos Roam, a bunch of Chromecast and Google Home devices. (Including a Chromecast audio device...rare but awesome) I have no apple infrastructure. My phone is a Google Pixel 6. I thought that with this app I would expose my cast devices to the Sonos app on my phone, allowing me to "airplay" from the app to my cast devices. (see image)

But that is not the case. When I select this I only see the Sonos Roam I have.... I'm guessing if I had an iPhone I would see the new virtual airplay devices created by aircast?