I have not been able to locate this option among the control parameters (i am using viewtracker and it works well enough).
I think it could be a really interesting option to avoid seeing the screen move continuously on IFR long flights in which it may be more interesting to alternate between the more or less fixed camera systems and the dynamic tracking system.
I will not assess the difficulty of coding this functionality, but you can put a comment if you find this useful, and maybe we will convince the developers.
Yes it is true, but at least in ViewTracker, the reconnection is slow (sometimes more than 5 seconds) and does not synchronize correctly(maybe is a problem in the ViewTracker software).
In my case, I have the camera functions asigned on a gamepad controller (the Cordless Rumpad 2 from Logitech) and the basics airplane controls on the Joystick .
The camera control functions of the gamepad are mostly disabled if the TrackIR is active and they recover if the ViewTracker is inactivated from the ViewTracker internal keyboard shortcut.
I therefore propose it in another more general way, that each controller has an assignable key with the enable / disable (asignable within the MSFS in the controller itself, or using the keyboard definitions in MSFS).