Kybella or Fillers? (Photo)

I suggest seeing an expert this area should be treated surgically to get a contouring like effect and then after you can do fillers or skin tightening with kybella and/or thermage/ultherapy.  Jawline implants also help.  Best, Dr. Emer.

It is hard to say without an in-person evaluation, but you may get a better result with something like Ultherapy rather than injectables such as Kybella for fat reduction or fillers to add volume. You don't appear to have significant excess fat under the chin, and fillers don't do much for jawline definition.