if looking at folks who do this from face-on viewpoint what you'd see at an impact still frame would be if you drew a line up the outside of the lead leg & on up the outside of the lead side of the upper body that line is goin to be either at or pretty close to perpendicular/straight so there's no or virtually no secondary spine tilt into or at impact the shoulders would be pretty close to being on a level
in essence if at set-up you drew a circle around the head position come impact the head would also have moved a fair ways to left to target side so to the center chest so head more level even further forwards of the ball position
other ways with a better player the -AoA can be more common is if folks 'handle drag' so moving the handle a good ways linear to left which overly maintains shaft angle so there's a bunch of forwards lean to the shaft which then has the club head traveling downwards into impact
and of course can be a combination of these things
say folks pretty good with short irons maybes take a good bunch of real estate with the strike this would tend to indicate that the stuff have been speaking to above is why the driver is being delivered with negative attack
if working around changing this to and "up + AoA" ball position real important along with set-up for sure but what tends to be more important is the things happening from transition & into the downswing
with a driver & a +AoA the low point is some inches trail side of the ball and as the clubhead moves upwards it also has to travel leftfield on the arc
so if get to a point to have a +AoA with a decent center strike location and the ball is tending to go straight leftfield or even starting left drawing left - don't immediately think the motion is wrong it's just a case of the natural movement within the swings arc just need to point the 'arc' so body alignments & club face to rightfield at set-up
