When a student clicks on the assignment name from their view, they are brought to the submission page for that particular assignment. When that assignment is a quiz or other native Canvas content, they see a submission preview, scores, and in the case of a quiz, can even start a new attempt if able. If the assignment is a SCORM assignment and likely other LTIs, they are shown "No preview available." This makes it unclear what they are looking at, especially to newer users to the Grades view.
I suggest including a different message than "no preview available" to make it more clear what the assignment is. Additionally, a simple "Click here to view this assignment" button would go a long way to ensure students are able to see which grade they are actually looking at.
