Why isn't the Indonesian-American population larger?

[Indy Texas]

What opportunities would an Indonesian person have to immigrate to the US?

Having family ties in the US is a major way to immigrate. But if there are few people Indonesia here to begin with, that means few people have that opportunity.

Skills-based visas are the other way. Most Indonesians aren't very well educated. Unlike, say, India, they don't have a strong English-speaking tradition or a very comprehensive higher education system.

[Indy Texas]

Wowzers on the Himalayans coming to America. At least in percentage there.

I'd imagine both the Bhutanese and maybe also the Nepalese are Lhotshampa; i.e. ethnic Nepalese forced out of Bhutan due to the government's exclusionary policies. Most of them went over to Nepal in the 80s and 90s, but ended up getting resettled, mostly to the U.S. as hope of return to Bhutan has become increasingly remote .

Here's a good old thread about this topic, featuring the now-departed for AAD poster Lewis Trondheim.

When I lived in Madison, weirdly enough, I encountered multiple Nepalese-Americans because apparently it's been a common place of resettlement for Nepalese refugees for the past few decades.