There is some problem with AirPlay support on Hifiberry OS after iOS 15.1 / macOS 12 upgrade.
Device is connected but it's silent and I see error in macOS console:
AirPlayXPCHelper APSEventRecorderRecordEventWithFlags:507: false condition
It looks like a first handshake problem. When first device is a Apple device and you adding a Hifiberry to connection everything works fine.