How can I fix my lower chubby and heavy portion of my face? (Photo)

You can consider buccal fat reduction. However, I would be very conservative in how much I remove. Else, it can cause hollowing as well feminization of the face

Patients often think that buccal fat pad removal will make your lower face slimmer but in reality what the procedure does is make your cheekbones more prominent and contour your mid cheeks which visually will make your lower face appear less heavy.