If the Pope has told the US not to crack down on migration and giving foreign aid, does this mean The Vatican takes migrants and gives foreign aid?

This did not happen. The pope, shortly before being admitted to hospital in February, voiced an opinion that the Trump administration's foreign policy plans would deprive migrants of their inherent dignity. He sent a letter to American bishops that questioned J D Vance's claims that Catholic doctrine supported American immigration policy.

Unlike the American government, the pope has not sought to interfere in the decision making of a democratic government.