There are lots of small airports where there are Border Patrol staff but I don't think they are counting people in and out as part of any organised and uniform

There are lots of small airports where there are Border Patrol staff but I don't think they are counting people in and out as part of any organised and uniform system? Take, for example, recent industrial action where striking staff were replaced with armed forces. Apparently, the system ran incredibly smoothly but I don't doubt a lot of the everyday bureaucracy was overlooked at the same time.