As per the title and as we can see below, hdmi 2.1 does not have the required bandwidth (62 Gbit/s) to get 8k + 60hz + 10 bit color + chroma 4:4:4, can you do a test if this Samsung TV supports DSC as known as Display Stream Compression?
Data Rate Required: 62.06 Gbit/s
Video Format: 7680โฏรโฏ4320 (16โถ9 ratio) at 60 Hz 10 bpc (30 bit/px) YCBCR 4โถ4โถ4 color Uncompressed CVT-R2 timing format
HDMI 2.1 can get up to 41.92 Gbit/s of free/net data rate, 48 Gbit/s with the overheads. So in theory without DSC this tv can do, see below,
Data Rate Required: 41.37 Gbit/s
Video Format: 7680โฏรโฏ4320 (16โถ9 ratio) at 60 Hz 10 bpc (30 bit/px) YCBCR 4โถ2โถ2 color Uncompressed CVT-R2 timing format
The calculator can be found it here https://linustechtips.com/topic/729232-guide-to-display-cables-adapters-v2/
Yes, this is correct. TVs that have a wide color gamut option but no HDR support won't benefit from UHD Blu-ray players 10 bit color gamut. In the case of the EG9600, the TV can support HDR through its apps only but not over HDMI since it doesn't have HDMI 2.0a. Our Samsung UHD Blu-ray player displayed a message at the beginning of a movie saying that the feed would be better on a TV that support high dynamic range (HDR), like it does with TVs that doesn't support HDR.
Update: We have the -UA version of the EG9600, and this one doesn't support HDMI 2.0a. But the -UB version does.
It seem that LG initiated an upgrade program for customers affected, if you have the -UA version, you may try to contact LG to see if they can do something about your TV.