If you create a new quiz through an assignment group and do not add quiz questions, the quiz will be worth zero points in the Gradebook. You need to add questions to the quiz before students take the quiz in Canvas. To display points possible for the quiz, add quiz questions to the quiz. Otherwise, you can change the assignment type to something else, such as No Submission or In-Class.
No Submission Quiz
If a quiz is takin in a classroom or outside of Canvas, you should create an assignment using the No Submission submission type. This assignment type allows you to manually set the points possible and enter grades for your students.
Create No Submission Assignment
Create a new assignment in your Canvas course. In the Submission Type drop-down menu, select the No Submission option.
View Assignment in Gradebook
You can view the assignment in the Gradebook and enter student's quiz grades.