Dead/stuck pixel or something else?

[czerwonekorale]

Hi, I recently found this black/grey pixel on my asus tuf vg27vq and I don't really know what it is. Depending of viewing angle its either fully black, grey or perfectly fine and what color or content is displayed does not matter. Also I found out that it's "behind" display. As shown in the photos depending from viewing angle its either above the mouse, to the left or to the right. Mouse is in the same spot on desktop. I tried everything - tapping, pressure, stuck pixel sites and videos for hours and it only got a little bit better. What can I do about it? Is it a pixel or very unlucky case of dust under display?