I have jowls and volume loss in my cheeks. What can I do to reverse this? (Photo)

It is impossible to give you good advice based on this photo. In person consultation or, at least, series of close up photos is needed for good evaluation.

With weight loss the skin can hang and age the face. Looking at your photos I'd suggest a face lift to reposition the soft tissue

It is very likely that cheek augmentation with implants would help to create more harmony in your midface;it is usually done from inside the mouth, so there are no visible outside scars. In person or teleconference consultation with a board certified plastic surgeon familiar with this procedure...

Based on clinical practice 6 months period after implant removal and antibiotic treatment would be sufficient time to consider placement of new implants.

Nasolabial folds are not caused by bone deficiency of any kind and for that reason facial implants od an any kind is not going to correct that problem. Current solutions are soft tissue fillers and they seem to be working well except for the cost. Hope this helps.