Creating HDR content for Apple TV 4K

Has anyone had any luck using FCP 10.4's HDR features when outputting content for playback on an Apple TV? I have a 1 minute reel of footage shoot in 6K with a RED Dragon and the project has been set to rec2020 PQ for HDR10 support. Grading went just fine using RED's IPP2 features. However, when I use VLC to playback the resulting file on my Apple TV 4K hooked up to my LG OLED HDR TV, it's clearly not the right color space. I tried adding the file to iTunes and using Home Share to access it, and it just gives me a solid green screen. Has anyone had success?

Thanks in advance

Are you color grading on an HDR monitor?

Yes, and the footage is quite clearly not in the correct color space when displayed on my TV. Not to mention through the iTunes home share it displays only a pure green image while the audio plays back fine.