How many Afghan immigrants are there in the United States?

Your concept of this question is too vague. What is the immigration data in this period?

1980 Soviet troops invaded Afghanistan. Later, some anti-Soviet guerrillas got help from the United States, and some eventually immigrated to the United States.

Later 1992, the pro-Soviet government collapsed and pro-American immigrants followed.

Then, after the American invasion of Afghanistan, some capitulationists began to emigrate.

There are no statistics on the above aspects. If you are interested, you can check the ethnic data of the US Immigration Service to see how many things are from Afghanistan.

Other information should not be found.