Nonsurgical skin tightening with an energy based device like the newest generation Thermage FLX may be a great option for you. Thermage used radiofrequency (RF) energy to tighten skin by stimulating collagen production. Its a great treatment for patient with mild to moderate skin laxity.
It’s best to remember that aging occurs on all levels of the face, from bone to skin. It sounds like you have used Sculptra, which is an excellent product for this region. This enhances superficial and deep volume. More Sculptra May be warranted. On the surface, daily Retin A, a series of microneedling, and chemical peels can be very beneficial. Kybella could be used if you had under the chin excess fat, which is difficult to assess from your current photo.