This is particular to Apple Mac computers and, more specifically, the M1 & M2. Please take a look at the following article for more information on this topic.
https://machow2.com/external-display-problems/
You can also try the following suggestions:
[1] In the Preferences settings > Displays. Make sure the resolution is set to 3840 x 2160. |  |
Open the Settings panel - [3] Select Device Settings. [4] Adjust the Brightness slider down a bit. [5] Adjust the Contrast slider down a bit. |  |
