I don't use an ultrawide* but if you're on Windows and get sick of having to move the mouse cursor all the way across the screen then I can recommend getting Di

I don't use an ultrawide* but if you're on Windows and get sick of having to move the mouse cursor all the way across the screen then I can recommend getting DisplayFusion and enabling the "Wrap mouse cursor around left/right monitor edges" function. *: My setup is two 27" monitors next to each other: one in portrait mode and one landscape mode.