2 years post op, I still have numbness in my face after Facelift. Is this normal?

There are two types of numbness from facelift surgery. The first comes from the separation of small nerves  during the lifting of the skin. This typically returns in a few months or as late as a year.  Although rare there can be damage to the major nerve trunks which could leave patients with permanent numbness. This is typically just on the ears. What would not be typical or even possible is the progression of numbness on the face. This may indicate another medical or somatic issue.

after 2 years I would not expect any change in your numbness.  The fact that it is spreading is unlikely related to your facelift surgery and neurologist would be the person to speak to, not a plastic surgeon.  Perhaps a second opinion from another neurologist would help.