I've had Students Commit a Lesson in Lt without PDF submission, but no panels were set to be Graded. How can I view their answers?

In order to view the Student Answers you will need to enable "Show non-assessed questions" in the grading table:
 

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This will let you set grades for any question even if it was not set to graded. They will not have a maximum grade set so cannot be auto-graded.