somebody already check this with warthunder developers and they response as:
Unless there is some sort of driver conflict with windows 10. It should not have an issue. The ability to use head movements are mappable. Just like all controls are. Game detects what windows is running and allows driver control at startup for whichever function the controller (in this case view controller instead of input controller). This is how oculus and freetrack, freetrack, etc all are able to run.
I did enable VR option to log into Warthunder and as well I can see VR setting in controls, but I am unable to assign tobii into it.
Before I bought tobii I used freetrack and I can confirm that it worked.
Have you any suggestion to enable tobii via the same input ?