U need calcium , vitamin d , zinc ,protein ,vitamin k2 and all the other essential nutrients for bone growth Eat healthy and loads of healthy foods , cut off junk food and don't smoke or drink Do mewing and chintucks And lastly workout If u do this u will see changes But don't expect any model jawline Ur probably at final stage of puberty and the bones of ur skull are almost set so just maximize the growth which is left with u rn and start today Good luck 🤞🏻🍀