FOV of tracking cameras (Quest 3)

Is there a way to get an accurate spec of the FOV of the tracking cameras, relative to the player's centerline?

In our app we want to render a full-body avatar of the player to be viewed by other players. But there could be times where the hands go out of the tracking camera's view and for that we want to compensate with our own mechanism. We need to get this number for our algos. (the FOV relative to the player's centerline, not the intrinsic FOV of the cameras themselves as they are also positioned at an angle from the player.)