It was originally mapped on E. I tried changed it to mouse middle but it made both the E ability and Melee ability on E. It wasn’t until I changed melee on the Xbox that it separated the two abilities

So I resolved it I think. I went into the controls in the game and changed the melee button to left on the D-Pad, and then assigning the middle click on my mouse to the left D-Pad button. Kind of annoying that the same one button on my keyboard was assigned to two different abilities, but I got it working good enough.