I had a mole removed on the back of my head is there any way the hair will grow back?

I suggest seeing a hair loss expert now to go over your condition and provide you information about your best treatment options. There are great non-invasive options like prp/progesterone and/or hair transplantation. See an expert. Best, Dr. Emer

It is doubtful that the hair growth would return two years post procedure.  I recommend scheduling a consultation with a provider well-versed in hair loss.  You can hair transplant to the area.  Another option depending on the size of the "hole" you're describing is to excise the existing scar so that you're left with a tighter scar that is a line rather than a circular scar.