All OLED display owners on PC should try these settings. Programs I use on my PC for LG C1 OLEDs.
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Hide the task Bar with this program
https://apps.microsoft.com/store/detail/roundedtb/9MTFTXSJ9M7F?hl=en-us&gl=us
CRU App
https://www.monitortests.com/forum/Thread-Custom-Resolution-Utility-CRU
ColorControl App for LG TVs
https://github.com/Maassoft/ColorControl/releases/tag/v9.5.0.0