Sagging in the mid face/ cheeks after weight loss. (Photo)

Based on your photo it is hard to see what exactly you may need. Most likely injection of fillers into naso-labial folds, lips, cheeks would help. In-person evaluation is needed to give you a more accurate plan of treatment. Good luck.

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  Based on
your photograph, you may benefit from facial filler injections.   Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.   The most
important aspect is to find a surgeon you are comfortable with. I recommend
that you seek consultation with a qualified board-certified plastic surgeon who
can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon