Quiz results vanished

Community Novice

Today I gave a quiz with a 65 minute time limit and due date of today. One student is special needs and needed extra time. I went in to the quiz and typed her name into the bar where it says who to assign the quiz to. She finished the quiz, but now hers is the only grade and quiz available. I've punched every button on Canvas and can't find those other children's quizzes. What do I do to retrieve them? Hopefully they are still there. Please help!