For example I watched plenty of 4K HDR like those:

• Tenet.2020.IMAX.2160p.UHD.BluRay.x265.10bit.HDR.DTS-HD.MA.5.1-SWTYBLZ

• Avengers.Endgame.2019.2160p.UHD.BluRay.X265.10bit.HDR.TrueHD.7.1.Atmos-TERMiNAL

• Joker.2019.2160p.UHD.BluRay.X265.10bit.HDR.TrueHD.7.1.Atmos-AAAUHD

Whice worked great with HDR displayed, but TV shows that I've tried to watch, the color of them looked faded away whice is the case when HDR content won't work properly. Examples:

• WandaVision.S01E01.2160p.DSNP.WEBRip.x265.10bit.HDR.DDP5.1.Atmos-CM

• Stranger.Things.S03.2160p.NF.WEBRip.x265.10bit.HDR.DDP5.1-HDRISTRASH

I'm on a Mi Box (1 version before the release of Mi Box S), and always used the most stable Kodi version.

Thank you