Buccal fat pad herniation during mini facelift led to removal. What can be done nonsurgically to add some volume back? (Photos)

Buccal fat pad herniation during mini facelift led to removal. Seems one side is a partial removal and the other is total as both sides are different. Additionally, I had this done solely to address neck laxity, which now is as it was before facelift which was 6 mos ago. What can be done non surgically to add some volume back?