Even though I'm dieting, my facial line doesn't get better. Could it be because of my sagging jawline?

I've been dieting lately and have lost some weight, but strangely, my face feels bigger, which is stressful. Looking closely, I think it's because my jawline has sagged due to a loss of elasticity, making my face look less defined.

I hate how my double chin shows up in photos, and every time I look at my side profile, I see my sagging jawline like a bulldog, so I hate looking in the mirror. I've heard that gua sha massage is good, so I try rubbing it every day, but it doesn't seem to be enough to lift my already sagging jawline. ㅠㅠ

I'm debating whether I should resort to surgical procedures. What lifting method would be most effective for tackling sagging jawline? Many people use procedures like Inmode and Ulthera, but I'm curious if they're effective at smoothing out sagging jawlines.

If anyone has tried to improve sagging jawline through lifestyle habits or exercise, aside from surgery, please share your tips. I want to regain my sharp jawline! Please recommend ways to manage sagging jawline!