Can the double chin that folds when I lower my head be smoothed out with a procedure?

Maybe it's because I have a habit of tucking my chin in and looking down whenever I use my smartphone, but at some point, even without lowering my head, a thick fold of fat formed under my chin lol.

My neck and face line are so blunt that the boundary is indistinct, making me look overweight, so I want to find a way to slim down my face. I'm afraid that regular contouring injections will only temporarily remove fat and cause the skin to sag like a shell later on. I have absolutely no idea whether I should get injections to reduce muscle mass or use an ultrasound device. Please let me know if there is a double chin procedure that provided the most significant V-line transformation for those struggling with heavy, sagging chin tightness lol.

I'm scared of bone-shaving surgery, so I'm desperately waiting for testimonials from those who successfully corrected their double chin with a minimal approach!