It seems that there are no DELIVERY in ATC channel before contact ground and request for pushback.It is important to have a DELIVERY and request clearance to an airport and get correct SIDs and transition.Also,a squawk is needed to identify the airplane and a emergency declaration is also important in ATC list.
Hey there! Tyler has said on previous live streams that implementing clearance delivery is something he would love to do, but there are currently some obstacles the devs have to troubleshoot first. I’m sure it will come eventually 🙂
This is also a duplicate topic
Use the linked topic above