My Graded assignment is showing the awarded grade as 0 while all test cases are passing properly.
these assignments are sensitive to the template code given in the assignment at the start of the uploading or updating workbook. Any changes made to the template code or adding new code lines can cause this issue.
Check this
to get codes according to the template code given to pass the grader.
Passing the notebook’s test cases does not prove your code is perfect. The grader uses different tests.
Please post a screen capture image that shows your grader feedback. That will give some hints about what the problem is in your notebook.
Also this thread has some tips for debugging issues with the grader.