If i still have nerve pain and numbness in my foot along the s1 nerve 2 years post surgery, am i likely stuck with it? can the nerve still regenerate

Perhaps some: If it is 2 years since the injury and points to a more permanent condition. There might be at least some small improvement. Nerves can regenerate to some extent but that is a very slow process. I am not sure what was done, but treatment for such conditions at this point are primarily supportive. There are varying degrees of nerve injury and they all evolve around the extent of injury.