SAMSUNG ODYSSEY G50D LS32DG502EEXXT is this a dead pixel or a dust under the screen ?

invalid@example.com (teacherkivanc), teacherkivanc
Tue, 19 Aug 2025 00:30:32 +0000
Displays

There is a very faint grayish thing under the screen of my monitor. It is not sharp or black. it looks like light gray on all colors. It is sometimes even hard to find where it is. Need to look very carefully to find it. So what can this be :