Their claims originate from the below article, which they are not illegal immigrant. They applied, were vetted and entered in legally, yet they aren’t citizens so no, they can not vote. Just the same ol’ bullshit.

https://thehill.com/homenews/ap/ap-u-s-news/ap-fact-focus-biden-falsely-accused-of-secret-flights-for-hundreds-of-thousands-of-immigrants/