I had parotid surgery this cause my cheek sunken Dr advised of fat grafting. Can my cheeks be chubbier naturally w/out surgery?

Generally, following parotidectomy surgery, there can be a deep depression on the side of your face.  This unfortunately will not fill in naturally over time.  Often times, muscle transposition is performed at the time of the parotidectomy or fat grafting afterwards (may require multiple sessions) depending on the depth of the depression.  Please consult with a board certified facial plastic surgeon who can assist you with achieving the goals you seek.