He looks (looked) like an excellent candidate for chin wing. Lip line up in before doesn't show mandibular retrusion (as in class 2 situation). So, he was a good chin wing candidate to begin with.
He had some chin retrusion and a jaw angle area that could be made lower and wider. So, chin wing targeted aesthetic correction of those areas.
There is some STRETCH to his lower lip. But NO info as to how long post op he is. PO time would give some clue whether or not the lower lip is temporary or permanent.