I have a rope like scar on back of ear after neck lift. Is this normal? (photos)

Twelve days is really to early for a decision on revision.  However, if needed this would require a relatively straightforward scar revision once the tissues have relaxed and are under minimal tension.  This would improved the width and the raised aspect of your incision.  Don't get discouraged.  This can be revised if necessary.  Good luck and take care.

It appears like you are developing a hypertrophic scar after your procedure. This requires attention early! Now is the time when your facelift surgeon can improve this with a local injection to decrease the scar production. If this continues to grow, you may even have a keloid formation