Besides all the sensationalist headlines, the stay is only for 14 days.

The previous administration entered into an agreement with Texas and a sheriff that DHS will consult and give them a 180 days notice before making any changes in immigration policy. The agreement was entered ~14 days before Biden became president.

You cannot contract away the U.S. government authority to implement immigration policies. There are numerous court cases against this.

This is just a dumb-ass spectacle by the Trump-appointed judge. This is almost certainly will be overturned.