Shreya Krishna, BDS, MDS - Account Suspended

Greetings of the day!
For a chin as receded as 2cm, a genioplasty does not suffice, you would need a formal lower jaw surgery. Lower jaw surgery is of various types, depending on indications and magnitude of the problem. Apart from choosing amongst the kind of lower jaw surgery, the other solutions are double jaw surgery or distraction osteogenesis.

Greetings of the day Antoine! Thank you for sharing your pictures. From what I can understand you have a receded and short chin. However the lower lips also look everted out. If you could share a picture of what your bite looks like, it will help with formulating a treatment plan.
Assuming your bite is normal, you will benefit from a sliding genioplasty which will advance and lengthen the chin.

If the bite shows a retrusion of your entire lower jaw, you will better benefit from a lower jaw surgery

Hello young lady! As i can understand from the pictures, you have a deficient malar prominence as well as a short chin. In order to improve your aesthetics and projection i would advise you to get a chin lenghtening genioplasty as well as malar (cheek) grafting or implants. Both of these procedures are done from within the mouth and leave no scars and the recovery period is not very long either.

Since the entire lower jaw is longer on one side and shorter on the other, a lower jaw surgery would benefit you. It would not only align your chin, but would also correct the difference in length of the two sides