1: On the frontal bone scan the RIGHT side of face would be on LEFT side of photo. Likewise the left side of face would be on right side of photo.
2: The RAMUS of the mandible (vertical part of mandible) MEASURES longer on the left side of scan (face). I observed that by drawing a vertical line from most outer part of ramus starting to where it can be seen below lateral cheek bone and where it meets the top of gonial angle. However, the horizontal distance from gonial angle to gonial angle does not show asymmetry.
Also when observing the body of the mandible the frontal bone scan, the symmetry looked within the norm. That is to say; relative to the frontal bone scan, the entire border of the mandible looks pretty symmetrical.
3: Because the ramus of the mandible MEASURES longer on the left side of the bone scan (face) BUT the whole body and lower border of the mandible, when viewed for symmetry, shows only very minor asymmetry, which looks within the norm, my observations yielded that the measure of the left (facial) ramus was longer because LESS of the CHEEKBONE (on left side of face) is covering it up. Similarly, the ramus measures shorter on the right side because MORE of the cheekbone on that side is covering up the upper part of it.
4: The bite looks pretty even on the frontal bone scan. So, doesn't look like a matter of one side of the of the dental arch looking longer/shorter than the other.
CONCLUSION: On the frontal bone scan, the CHEEKBONE on the right side looks more robust than that on the left side in terms of targeting location of asymmetry. So, that could suggest that the PERCEPTION of the JAWs being asymmetrical is an illusion from the cheekbones not being symmetrical with each other. So, consider jaw surgery does not address that area directly.
A photo of my line comparisons drawn on your frontal scan is included.
NOTE: Your frontal photos (self taken) were looked at but not depended on in my evaluation (beard, off poses, etc.). A frontal bone scan is adequate to look at to see where asymmetry could be coming from.
OTHER:
Lack of upper tooth show is addressed by adding a graft to the maxilla during a lefort 1. A graft to kick up more tooth show can be a uniform one of little to no rotation especially so if whole upper dental arch could benefit from more tooth show. More tooth show is also kicked up via advancing the maxilla in addition to grafting it.
An edge to edge bite in addition to a complaint of the upper jaw being recessed would be addressed by bringing the maxilla forward during a lefort 1. So, lefort 1 can address both those issues. (But not a perceived asymmetry to the jaws IF the main asymmetry is coming from an area not changed during jaw surgery, e.g. the cheek bones.)
An illustration is included with this post.