Has a College Football game ever ended 57-56?
Exactly once. On November 14, 2021, Kansas beat Texas 57-56, and no College Football game before or since has ended that way. When it happened it was a scorigami, the first 57-56 in league history.
That makes 57-56 the 1819th most common final score out of 2,215 that have ever occurred in College Football. One point away, 58-56 has happened 2 times and 57-57 has happened never.