How to edit the shape of pads for a component footprint in Fusion 360?
You shouldn't have to, the pads are in the wrong spot. Check the datasheet again and use the pad recommendations (if any). If those can't be found then find the industry standard part (or look elsewhere on the manufacturers site or contact them directly about footprint information). It's not likely that a PCB manufacturer would be able to put a chamfer (that appears to be under 3mil) as most have a lower resolution around that size for standard manufacturing.