I have similar experiences as the top-comment. Moved to US in 2017, bought a house in suburbs of Seattle.. have great relationship with neighbors.. meet new people through kids' school. I went to houston for a short period and met some interesting people through meetup groups. I think some of it is just individual leanings - you need to adjust to be part of a community.
Exactly. I also have some enduring friendships - the longest having now lasted 14 years or so with people I met at meetup groups.
A crucial point that gets brought up on HN time and time again, is that you need to let yourself develop interests that are outside of work, and then you can meet people who share those interests.