MarsSeed [1] filed a deletion request for pulseaudio-airplay [2]: AirPlay should work with current PulseAudio.
See guide: https://wiki.archlinux.org/title/PulseAudio/Examples#Enable_autodiscover_AirPlay_(raop)_server_support This package has not been updated for almost 2 years. Installing Arch [extra] pulseaudio is recommended instead of this. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/pulseaudio-airplay/