In OW1 my whole screen is used while in the OW2 beta i have black bars left and right. I don’t know why this is but i noticed this because i got a new Monitor with a 21:9 aspect ratio.
Still not fixed.
I have an LG 38GN950 with 3840x1600.
In Overwatch 2 i have like 50px wide black bars on the left/right side of the screen.