Here’s something I fight with hundreds of times a day, day in and day out.
It’s even more of an issue on larger resolution screens - I’m using a 49" 4K screen (1:1 pixel ratio) and use the full width of the screen when working in the Key Editor Window.
The algorithm Cubase uses to determine where in the window the part initially shows up can change depending on where your playhead is located in the project so it doesn’t always show up on the left. But I wish it was just more consistent and always started the part near the middle of the window and not on the left-hand side which is where it shows up for me about 90% of the time.