Can’t make AirPlay work with multiple destinations? Here’s why

Apple’s upgrade to its original AirPlay audio/video streaming protocol, AirPlay 2, lets you choose multiple audio destinations while listening to audio playback, like music or podcasts, or streaming video. However, some people have found there’s a catch: when they use the AirPlay selection dialog in iOS, iPadOS, macOS, or tvOS, they cannot select multiple devices. What gives?AirPlay 2 requires that all devices selected are also AirPlay 2 destinations–they must be up-