I live in a major city as well and rarely see bengalis in restaurants or masjids unless they are blending really well.
As for quota, go look up who is on all the posts in karachi and compare it to who actually is born in karachi. That 1% comment is from my own family relatives and friends who tried applying for jobs but came up against that wall.
If sindh is doing so well then why are you sitting in America?
Bit hypocritical aren’t we???