Covid mandates for Americans, but not for migrants pouring into America?

Biden’s border crisis continues to get worse as time passes! Illegal border crossings are up 300% compared to this time in 2020. Illegal alien apprehensions along the southern border are absolutely skyrocketing. As Tucker Carlson points out, the Biden administration is pushing for there to be vaccine mandates for Americans, but not for migrants crossing our border. If the goal is to stop the spread of Covid, then why wouldn’t the same rules apply to migrants coming into our country?