Thank You I was looking at the input signal and not the output. I am indeed seeing 4:4:4 12 bitNo
The player will be actually be outputting 4:2:2 (or 4:4:4 if you've set it up for that).
You can check via Option button on the remote while a UHD is playing. Option, then select Playback Information Window. Top line of this pop-up window is input signal info, 3rd line is the HDMI output info. Input signal will show 4:2:0, output 4:2:2 or 4:4:4. Both work OK at either 10 bit or 12 bit into your LG Oled.