Hi @JasonJay ...
Yes... so when you create assignment groups on your "Assignments" page, those assignment groups show up as columns in your Gradebook (typically at the end of your Gradebook view). If you would like to filter by those assignment groups in your Gradebook... click on "Grades", and then click on the "Apply Filters" button on the left side of the screen. Go down to "Assignment Groups", and then select one of the assignment groups that you had created from your "Assignments" page. This will only show those assignments in that assignment group.
How do I filter columns and rows in the Gradebook? - Instructure Community - 1016
Does this help? Let Community members know...thanks!