Showing an administrator about for one of my Canvas course, I noticed that he has access to the course as me. There was an option for him to take click "Preview" for a quiz I made and it also gave him the option "Keep Editing Quiz." This feature and any features that allows an admin to edit the course assignments and grades should be restricted.
Hi, Sammi Venegas! I noticed this setting in my course, as well. I believe your Canvas admin can change this role. Do you know who that is at your institution?