Marco, FO View is accessed inside the interior views by pressing "A" a few times.  This cycles the views within each category of views.

I.E. pressing "S" changes the view category such as Exterior, Tower, Interior, etc.

I.E. pressing "A" changes the view within the current category, such as Interior will cycle between 2D panel, Capt view, Capt alternate view, FO view, Cabin view, etc.

Its there, I assure you, I use it every day when I run through the FO's checklists. ;)