Excessive alar base reduction can be improved, but not reversed
In order to widen a nose that was excessively narrowed, one can add a composite graft of skin and cartilage to the inside of the nose, where the ala attaches to the face. The added scar in this position is not very noticeable. However, such approach can only add about three millimeters of widening, otherwise the scars may become too obvious.
I would not recommend this surgical intervention for cosmesis, I would only recommend surgery to improve obstructed breathing.