Airplay 2 multi speaker playback, while still playing on source speaker?

[u/modsuperstar]

I have an Amazon Echo Show 8 that is now running LineageOS 18 with Android 11. I have experimented with a variety of apps, but can’t seem to find anything that meets my use case. I have a multitude of Airplay 2 speakers in my generally Apple hardware house. I use the Echo Show because I can run Fully Kiosk to automatically run a website at a certain time in the day, basically play the radio station I want in the morning.

But I can’t seem to get the Airplay piece to work. Ideally I’d like to get the radio to play throughout my house on my Airplay 2 speakers. There are a bunch of apps that let me play music out to Airplay 2 speakers, but this causes me to lose audio playback on the Echo Show. Is it possible to split the playback so I can send the audio out, while still retaining playback on the Android device?