So, a few numbers - this past weekened was 2x void + 10x on Ync. Let's look at the expected value from 400 voids in terms of number of legos you should be getting. Given your odds are 1%, let's simplistically say you're expected to get 4 legos. Let's also pessimistically say you only got three.
The odds of pulling a targeted void champ on a 10x weekend, given there are approximately 70 void legos, is approximately 10/70 = 14.3%. The odds of *not* getting the 10x'ed lego after pulling three voids, is (1 - 0.143)^3 = 63%, and therefore the odds of getting it is about 37%.
That means for every 400 void shards pulled, you're only looking at 37% chance of getting her. Your entire clan using 400 voids still results in a less than 50% chance of the outcome you're looking for.
Furthermore - while it's certainly *possible* that from 400 shards your clan got absolutely zero legos, it's much *more* likely that some people did in fact get some forgettable void lego and simply didn't mention it.