If I get a procedure to remove the thick double chin that folds when I lower my head, will it become smooth?

As I have accumulated a bad habit of tucking my chin in and looking down whenever I look at my smartphone for several years, at some point, thick folds of fat formed under my chin even without lowering my head.

My jawline is so blunt that the boundary between my neck and face is indistinct, making me look very dull and overweight, so I want to fix this by any means to make it look sharper.

I feel like getting regular contouring injections will only temporarily remove fat, and I'm afraid that if I lose elasticity, my skin will sag like a shell later on. I have absolutely no idea whether I should get injections to reduce muscle mass, or if I should just use an ultrasound device to burn the fat and tighten my skin.

For those like me struggling with a double chin that feels heavy and sagging under the jaw, please let me know if there is a double chin procedure that resulted in the most dramatic V-line transformation. I am afraid of cutting bone with a scalpel, so I desperately need to hear the experiences of those who have achieved a slimmer double chin through minimally invasive double chin correction procedures.