Let's assume Miran's numbers are right and 2 million people have left or been deported from the United States.
A large number of those people were employed legally or illegally. Yet since Trump took the Presidency, there have only been 937K job additions in the non-farm payrolls report (through August). If you assume a +50K static rate, then there are at least a million jobs missing there.
Now I don't think that 2 million number is necessarily correct but Waller's point stands: If you're deporting a worker, that worker would normally be replaced.