Career IFR flight plan

Can someone please enlighten me how can you change/plan the flight for IFR, even if the career mission is VFR? I tried changing the flight rules in the EFB and filing again, but nothing. I’ve tried it both in briefing and inflight. If the sim deems it’s VFR, so it is. Is it mandatory the departure airport being IFR capable, i.e. having published departures?

Dont’ use the EFB, use the avionics.

1st of all, not an answer to the question.
2nd, how are you supposed to switch from VFR to IFR ATC in avionics?

There seems to be an issue with IFR throughout the sim: