The Pixel 8 Pro has a slightly taller 20:9 aspect ratio, and actually drops a little in resolution from 3,120 ... bit shorter despite keeping a 6.7-inch screen and changing to that 20:9 aspect ...

In other words, how many pixels per inch depends on the size and resolution of the screen you're talking about, so we'll have to do some math to get the number you're after for yours. Related ...