Trying to airplay HDR to LG CX

Hey.
I’m trying to airplay a HDR (hlg) file to my new LG CX, but it’s not detecting the HDR. I believe it was ripped from netflix or bbc iplayer.

First time trying a file with HDR

Newest iOS, infuse and tv firmware.

AFAIK, AirPlay has not been updated to support HLG, so these videos will be played in SDR.