No, i played with it and it can’t be done, the only way it can be, is to have a pi running as a “grabber” using a hdmi splitter and a usb video grabber and it will work for “any hdmi source” then I have my XboxOne/Virgin/RetroPie all running though it via a hdmi hub…
What? You 100% can run Hyperion on RetroPie. I have it running just fine. Works great with Retro games and streaming games from PC to moonlight on the Pi.
Playing from Emulationstatio / RetroPie
Moonlight before getting the startup script implemented in Emulationstation: