Your photos appear to show a lean face with mild to moderate lower-face/jowl laxity and some upper-neck looseness. When the main issue is sagging skin and deeper facial tissues, the most reliable correction is usually a lower facelift with a neck lift, often with SMAS or deep-plane support and platysma work if the neck needs it. Fillers or fat grafting can help selected volume loss in a very thin face, but they will not truly lift loose skin and can look heavy if used as the main treatment. An in-person exam is important to check skin quality, platysma bands, submental fullness, chin projection, and how much laxity is present. Energy devices, threads, or skin tightening may give only modest improvement, so if you want a meaningful jawline and neck change, consult board-certified plastic surgeons or facial plastic surgeons who do many face and neck lifts and ask to see similar thin patients. The goal should be a natural lift rather than simply pulling the skin tighter.