No, 50 million immigrants didn’t come to the US in 2019. That is 1/7 of the population of the country. If you believe that, you are a moron.
Actually
You are wrong. Here is the 2020 data:
https://www.un.org/en/desa/international-migration-2020-highlights
“The report found that two thirds of all international migrants live in just 20 countries. The United States of America remained the largest destination, hosting 51 million international migrants in 2020, equal to 18 per cent of the world’s total. Germany hosted the second largest number of migrants worldwide, at around 16 million, followed by Saudi Arabia (13 million), the Russian Federation (12 million) and the United Kingdom (9 million).“