Has a Women's World Cup game ever ended 9-1?
It has. 9-1 has been a Women's World Cup final 4 times in 1,721 games. The first was Romania beat Macedonia on September 20, 2013; the latest was Turkey beat Luxembourg on April 8, 2017.
That makes 9-1 the 27th most common final score out of 40 that have ever occurred in Women's World Cup. One point away, 10-1 has happened 2 times and 9-2 has happened never. Nearly all of its occurrences fall between 2010 and 2039.