Sun Moon apparently sold through 7.2M by November 30th.
Sun and Moon didn't launch in all regions simultaneously so the 7.2m figure is an estimate taking first week from each region.
It's hard to know how much Sun and Moon did in its first week due to the later release of the game in Europe.— Daniel Ahmad (@ZhugeEX) November 21, 2019
In NA the game sold 3.7m in under two weeks.
In JP the game sold 2m in its first week.
In EU the game sold 1.5m in its first week.
So 7.2m in total, but not aligned
NA says "under two weeks" though so it's probably less than 7.2m