How to drill through soffit corner?
Well if you are asking if it can be done the answer is yes. To have the best chance of success move  ~1-1/2 inch away from the wall left or right so you don’t hit a rafter or joist and close to the exterior siding. When I do this I drill at an angle , it hits the top plate the way I drill but makes the pull easier and not as sharp of a bend on the cable coming out and following the wall to soffit can look like fat calking after painted if trying to hide the cable.