Which procedure would help me achieve more projection and definition in the chin and jaw area? (photos)

Ultherapy is a non-invasive procedure that lifts the neck, chin and brow, and improves lines and wrinkles on the upper chest. As we age, collagen breaks down, resulting in loss of skin strength and elasticity. For tissue tightening, Ultherapy is ideal for the lower face and neck and we often combine it with CO2 laser or Morpheus8 to further enhance results. Chemical peels and skin resurfacing should be done at least 5 to 7 days after, but can be performed earlier, depending on treatment severity.

Best,
Dr. Karamanoukian
Realself100 Surgeon

The best chance will be a combination treatment of chin implant, neck liposuction and Thermitight. Any of these alone will help but not as much as the combination.
Regards
Dr. J

Based on your photos, I think a chin implant and/or liposuction would greatly improve your lower facial balance. The most prominent point of your chin is too high in the profile photos so a well-placed chin implant will place the most prominent point more inferior. In addition, the submental skin will be stretched and provide a better profile appearance.