Is the temporary flightplan not being available intentional?

[MR.TX]

Hey guys, I recently started flying the ini A330 and coming from many other 3rd. party Airbus aircraft there was one thing which struck me as very odd.

When editing the flightplan in the FMS for example when setting up a departure or arrival I'm not prompted with the option to take a look at the temporary flightplan but rather just with either inserting or erasing my selected departure/arrival, nor have I been prompted with the temporary flightplan when making edits to my active flightplan. 

This lead me to wonder if ini simply modeled a specific version of the fms which doesn't feature a temporary flightplan (not that i would've seen such thing before), or if its simply a missing feature?