It’s just not there lol! I’ve tried multiple computers and downloaded the last beta with no luck. All my old missions have replaced the takeoff command with unknown.
Certain functions only appear when connected to suitable FC.
I.e. you won’t get a takeoff command when connected to a rover, but it will be there once connected to a plane or copter.
I’ve never run into that before. When I’m flight planning, I’m not connected to anything lol!