Hi, and welcome.

Most of the West Coast of the US has a strong and well integrated Asian community. Of course there are the Chinatown districts in LA and San Francisco but check out Seattle and Portland as well, and of course Silicon Valley.

On the East Coast, New York and Boston for sure. Though I hear that many second and third generation Chinese are heading east from Manhattan to Queens and parts of Long Island.

I suspect these days there may even be some well entrenched Chinese and Filipino communities in parts of the Midwest, given migration patterns. (I've been outside the US for a while now, though I try to keep in touch.) Chicago and St. Louis, for sure, but those are certainly not the only areas.
Cheers,
Bev