Radio call sign will only be AF1 if they want it to be. If there is a civilian airport with a ground operation waiting for AF1, then it the flight will probably call itself AF1 when communicating, unless there have been other arrangements made with the ATC/authorities at the airport.
there is not and its only for civilian airports
AF1 will most certainly fly through Enroute sectors as well, and those are “civilian”.
Radio call sign will only be AF1 if they want it to be. If there is a civilian airport with a ground operation waiting for AF1, then it the flight will probably call itself AF1 when communicating, unless there have been other arrangements made with the ATC/authorities at the airport.