After 1 and 1/2 years it is unlikely that hair will regrow in the area and minoxidil 5% will likely not be of benefit. Hair transplantation in the area may work depending on blood flow. This would need to be assessed by a qualified hair transplant surgeon.
IF the scar is deep within your hair, then scalp micropigmentation will work to hade it very effectively, otherwise a small hair transplant will work well. See below