Everybody has facial asymmetries including supermodels! Some more, some less. I don't see too many asymmetries in your face based on the pictures provided. In general, though, one can use a filler on the deficient side or use Botox or another neuromodulator on the excess side for facial sculpting if the masseter muscle is hypertrophic. I suggest you see an experienced plastic surgeon who performs non-surgical and surgical procedures for facial sculpting if that's what you need. I am not sure, however, if your asymmetry is significant enough to entertain correction. Remember, new problems can be created through any treatment even when performed by the most experienced physicians. All the best!