No sound from HomePod
I am having issues with my iMac 2021 and Homepod Mini.
I can play music and sound from my iPhone 12 to the Homepod Mini, or even get it to play on its own. But no sound when I ahve connected it to my iMac through Airplay.
I connect it though settings, sound and click on Airplay and then the Homepod. The Homepod then lights up.
I can use the pause on the Homepod to start and stop a video, but I just don't get and sound from it.
When I look in the Home app on the iMac it shows that the Homepod is playing, when I connect back to the iMac speakers it shows it as paused.
I have 2 Homepods and this is the same with both of them
Any ideas appreciated
iMac 24″, macOS 12.6