Using Sonos through the Amazon music app

Apologies if this has been asked before, I've searched for an answer but couldn't find it.

Basically I want to use the Amazon music app to play directly to my Sonos speakers (2 x era 300s) and thus not have to use the Sonos app.

Amazon music doesn't seem to be able to find my speakers. I want to use a WiFi connection to "connect to a device" rather than Bluetooth to maximise optimum audio quality. Phones and Sonos speakers are on the same WiFi network. I really want to avoid using Amazon music via Sonos app, it's so clunky and not very user friendly. It works fine playing to the speakers with Spotify through Spotify app, why why not with AM?

Is this even possible with Amazon Music? What am I doing wrong.

Using a Pixel 7 pro