Few years back,when google released the Pixel2xl(it was made by LG) the display's colours were very washed out in vibrant mode,in natural mode, were horrible. Pixel 2xl had a new added polarised coating to its display(to help to see the screen when using sunglasses) . Google sent out an update and fixed the issue.
Will Samsung fix this for us,i don't know.
I compared the s23u to s24u in total dark room,both on dark mode ,scrolling on YouTube, the s24u has zero ghosting of black(crushing black colour),the s23u has some,like most oled displays, not as bad as it used to be years back.