Bold claim cotton
The data is publicly available.
https://www.dol.gov/agencies/eta/foreign-labor/performance
This proves the first part of your claim, not the second (which is wild speculation and no data exists)
The US has successfully brain-drained the rest of the world over the last 20 years.
https://nfap.com/wp-content/uploads/2020/05/The-Impact-of-H-...