I have an excessive skin above scar line after bilateral upper eyelid surgery. Is this normal? (photos)

Your surgeon is correct that sometimes there can be a little excess skin appearance above the incision that improves with time.  Sometimes the eyelids can be a bit swollen just above or below the incision.  Looking at your pictures and since you are now 3 months out I would talk to your surgeon as a it looks like you may have a little retained excess upper eyelid skin on the side of your concern.  If this was a medical/insurance blepharoplasty then more removal would be cosmetic, but you would need to discuss with your surgeon.  Best regards.

In review of your photos, it appears as though the left lateral brow is lower than the right. I doubt if this will improve over time . A conservative revision ,so as not to "pull" the brow down further, could be done. Most likely , the brow asymmetry was present prior to your blepharoplasty.