It’s possible, especially if we take into consideration the mention of a possible war brewing.
Regardless, the mention of Gellert Grindelwald reminds us that, during this time period, Dumbledore’s former best friend is wreaking havoc across the pond.
Is she referring to the beasts that have escaped all over New York?
Or maybe this is just meant to be an offhand reference to remind us that the U.K. is dealing with its own magical catastrophes during this time period.