It would be helpful if you showed the flight plan in the MCDU. I’m just guessing that the plan is loaded into the sim (which is why the VFR map shows it), but not loaded into the plane (which is why the navigation display is incomplete).
Are you importing the Simbrief flight plan from the EFB? Planning the flight from the World Map isn’t recommended, and if you check the FBW documentation it will walk you through importing the plan from the EFB.
You should also check what your fight plan sync settings are in the EFB. The FBW documentation explains these options as well.