I had cheek and jaw implants removed in November, but now I have laxity and visible scar tissue.

It appears from your photos that fillers like fat or Juvederm may be all you need.  You may need to wait a bit to allow scar tissue to subside, but physical exam needed to evaluate properly. Be sure to consult with a board certified plastic surgeon. Good luck!

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  I have performed a mini facelift and fat grafting for similar patients in the past.  This may be a good option for you.   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