Correcting protrusion of mouth is not cosmetic surgery, but dental treatment.
If your mouth stands out because it is big, you can have plastic surgery.
The cost is not too expensive (about 9000 RMB).
From what you wrote, it's not quite right.
You really want to know if you can do it, the cost of surgery and so on. . Send me your photos (front and side).
I'll explain it to you in detail!
I wish you happiness ~