Packages like Volumio with give you the ability to stream music over Airplay (inc Airplay 2) but the TV side is not supported by anything outside of the Apple boxes.
LibreELEC (and Kodi) is now supported on a Pi 4 V9.2 here
OSMC only goes to Pi 3B+ Downloads here - I think they are pushing you to the Vero 4K+ boxes rather than a Pi solution.
OpenELEC is ...
AFAIK it's possible to get Netflix working in Chromium in Raspbian OS, if you manage to rip the DRM library out of ChromeOS. I haven't tried it myself, but this user seems to have succeeded on a Pi 3. I don't see why Pi 4 would be different.