Hello PMDG Team, possible to add an option so that we can add the terrain ND also to the FO´s side (probably with SP1 or so)?

Terrain was not added to the FO side due to impact on frame rates and performance. Might be added in a future SP. I think the priority right now is to get the NGX as finely tuned as possible and resolve issues people are having first though. So it probably not high on their list at the moment.