Septoplasty alone to address a deviated nasal septum is not meant to change the shape and appearance of your nose, the aim is to improve the breathing and nasal obstruction.
A rhinoplasty can also be done at the same time (Septorhinoplasty) to change the external appearance and shape of the nose.
When the deviated septum is mainly "internal", it is not necessary to perform a rhinoplasty at the same time to correct the shape of the nose.
However, in some cases, if the deviated septum and the external nose is deviated as well, then the combined Septorhinoplasty procedure would be medically necessary.
Septorhinoplasty can be functional or cosmetic, this will depend on the assessment by your surgeon at the time of consultation.