3000 grafts not enough, why? (Photo)

Assuming that all of the grafts grew, your may have fine or very fine thickness hair. The total hair bulk needed to cover these areas are probably insufficient to get the density you want with the length of hair showing. Alternatively, if your hair is medium weight or thicker, it is likely that many of the grafts just didn’t grow.  To get a fuller look, (1) longer hair will give you more hair bulk if your hair is fine,  (2) more hair grafts will help for fine hair, or (3) if the hair transplant failed to grow all of the grafts, then another hair transplant would be a good idea, possibly with another surgeon, and (4) Scalp Micropigmentation can make the hair look fuller. You didn’t show the hairline so I can’t comment on that.