No christmas gift

How do you manipulate the FMS’es in VR, if you do not mind me asking? I also got a headset but found myself only flying things like the Stearman, as complex avionics are somewhat tedious to manipulate. I tried the islander earlier and while I could use the inner GPS knob with my VR controller the outer did not move as if something was missing.
So I imagine a more complex aircraft would be even more of a hassle.