Change Callsign without going into menu

Is there a way to Change the ATC callsign without having to go back to the Worldmap?
So if you wan’t to do multiple flights in a row, without leaving the sim.
Is there a way to achive this?

In the MCDU you have to select “INIT”, then enter your flight number and then click FLT NBR

but that doesn’t change the callsign for the ATC engine in MSFS.

Sometimes it does