I'm not sure that's true given that immigrants are 80% more likely to start a business than people born in the U.S.[0]. That's the case in almost every country[1].
[0] https://www.wbur.org/news/2022/05/09/immigrants-are-80-more-...
[1] https://hbr.org/2021/08/research-why-immigrants-are-more-lik...