bazzite supports it I believe but I am not sure my n150 based mini pcs that I'm using on my tvs does. This was running on six your old tvs until this month when I bought a lg g5 for the basement. It looks great but I couldn't say if it looks the greatest it could look with HDR on or not... My previous tv frontend was a custom nixos setup that was a pain to maintain over the years. bazzite just works and the setup is simple for my needs (basically autologging in to kde and autostarting jellyfin media player in full screen plus a systemd timer to ensure the system updates and reboots overnight while I'm sleeping.