AirPlay 2 audio to multiple targets from macOS Catalina?

Hi gang!

Having become very used to being able to stream audio to multiple speakers from my iOS devices, I was kinda surprised to learn that Mojave still only supports a single AirPlay 2 target at a time. iTunes on the Mac was able to do this many years ago, so it’s a bit weird. (I wanted to stream from a different source than iTunes.)

The obvious workaround is of course to stream from iOS, but as the iMac is always at home, always plugged in, it would be practical at times.

Does anyone know if multi target AirPlay 2 audio could be included with macOS Catalina later?