Has an Olympic Hockey (Women) game ever ended 6-3?
Exactly once. On February 16, 2014, Russia beat Japan 6-3, and no Olympic Hockey (Women) game before or since has ended that way. When it happened it was a scorigami, the first 6-3 in league history.
That makes 6-3 the 27th most common final score out of 41 that have ever occurred in Olympic Hockey (Women). One point away, 7-3 has happened 2 times and 6-4 has happened never.