6 weeks post-op. Why does my new crown’s margin sit above the gum line? (photos)

Ideally, if health and longevity is considered all crowns would be finished above the gum line.  The interface of tooth to crown is easier to keep clean and is less prone to cause gum disease or get recurrent decay when finished supra-gingival..  It also preserves healthy structure.
Sub-gingival margins compromise health in favor of esthetics.Thiis is taught in every deental school.

Hello,
You don’t have to worry about it, that’s right position of your crown and in few weeks you gum can adapt around the crown and above the gum line you can clean it better and avoid problems in the future.  

Good luck.