Android game ultra low resolution after building !!! Also in Device Simulator.

My game looks normal in game view, but when I built it for android and played it, it had a ridiculously low resolution for some reason. I didn’t know device simulator existed in unity, but now I see that even in device simulator it shows already that resolution will be small (I’m talking about 100 pixels in total). I can barely see that it is even my game.

My canvas is set to Scale with screen size, and reference resolution is set to 1920x1080. Also, I tried setting fullscreen mode in my player settings to both fullscreen window and windowed window, and none seem to fix the problem.

Are there any other options for screen resolution?
Can somebody answer as fast as they can ???
@Kurt-Dekker maybe?