Hi @Carmelo2022,

What you're describing is the general behavior of Canvas.  If an item is not graded, it basically does not count towards a user's total grade.  In order to get an "accurate" final grade, the teacher will need to give student's a score of 0 for the assignments they did not do.  If the assignments are online and have due dates, teachers can set up a missing policy to automatically give missing assignments a 0 after the due date passes.

Hope this helps!

-Chris