Has an Olympic Soccer (Men) game ever ended 4-2?
Exactly once. On May 27, 1928, Portugal beat Chile 4-2, and no Olympic Soccer (Men) game before or since has ended that way. When it happened it was a scorigami, the first 4-2 in league history.
That makes 4-2 the 17th most common final score out of 27 that have ever occurred in Olympic Soccer (Men). One point away, 5-2 has happened 1 times and 4-3 has happened 2 times.