The cheek area can be augmented by synthetic fillers, natural fat transfer or implants. When properly performed fat last longer than any filler and allow better shaping than implants. Without accurate pictures it is not possible to make any recommendations more specific.
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...
It is hard to give you exact information without seeing you or seeing photos of you. Facial shapes are different for men and women. Women tend to have soft, round cheeks while men have more angularity to their faces. Many times, just adding filler to the cheek/chin area can...