Why is it for the last assignment I got 0/10 even though it was submitted? I'm not sure if this is correct or not.

Assignments submitted past the extension period will not be graded. The extension period is 72 hours (or 3 days) after the posted deadline. You may refer to the course portal for your assignment deadlines.

Assignments that are marked Incomplete will have a score of zero. Make sure to update your assignment and resubmit it within the extension period for it to be graded.