Hello,
Thank you for the question and the photos. It is too soon to tell at only 4 days after your procedure. Some of the lack of depth may be swelling. Once the swelling has subsided you can evaluate the depth of your belly button as well as your options for making it look...
It would be somewhat difficult to repair all the muscle through right through to the breast bone through just an umbilical incision. One would be able to repair the some of the muscle however not the entire length. You would need a larger incision to gain access to all the muscle. If...
If you are very thin, then you can not really have a very deep belly button. Still, I do notice that yours has no hooding. This could be corrected, but based on the limited photo, I can not tell if it would necessarily look better.