A lip lift does 4 things: shortens the distance between your nose and upper lip, increases the mucosa of the upper lip, increases the incisor show and pulls up the corners. You would be a good candidate for a lip lift.
Best Wishes,
Gary Horndeski, M.D.
This is my expertise and a huge portion of my practice. Asymmetry is normal and expected. Buccal fat pad gives slimming not symmetry. Masseter botox will make you slimmer and make the jawline more loose. Fillers help give shaping and contouring. If you want perfect or close to perfect symmetry...
A lip lift will improve your teeth show, even though your philtrum is not excessively long. From your picture, I can guess that it measures about 1.5 cm. You could shorten at least 5 mm and improve your smile. Your teeth are high and you might still have issues with teeth show at rest.