On my end I’m using quietvoid’s Kodi with PlexMod now.
Makes P8 out of P7 on the fly and ignores HDR10+. So it turned out to be a play-everything-solution for the Fire TV 4K (Max) at the moment.
Would be great though if the Plex developers found a solution for a problem that lots of people should have, since the Fire TV is a popular device and the market keeps producing the problematic formats.
