Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
According to this thread, there was a channel called Trimeplay that was providing at least some AirPlay functionality for a while, but it seems to have been defunct now for many years. The creator of the channel discusses the challenges of incorporating AirPlay into the Roku BrightScript programming language.
Squirrels LLC has an app called Reflector 3 that can turn a FireTV, Windows PC, etc. into an AirPlay receiver. It would be great if they would create a channel for Roku that would turn it into an AirPlay receiver. With the number of Roku units out there, I'm sure they'd like to. The only thing that's holding them back is probably there willingness to tackle the BrightScript language.
Well, Apple wants to promote their own player (Apple TV), so they aren't going to make any effort to support competitive players like Roku. And for a 3rd party to provide a legal channel for Roku, they would have to license it from Apple. I have my doubts that would be cost effective.
Dan Nvidia Shield, Roku Stick (3600), Ultra (4640), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.