All the examples (people and neighborhood names, the question about the salwar suit) sound South Asian to me, so maybe it's launching first in India?

In the mission, it mentions Indian cities specifically "In big cities across India, it’s getting harder to get good answers" https://neighbourly.google.com/mission/

Notice the language options in the lower-right corner of the footer. They have English options for the UK and India, but not the US.

I noticed that. I was thinking it was an UnderArmour kind of thing that Google bought out, or, only available in a certain locale.