MAC Pro OS Monterey 12.3.1
I'm working through the Animation tutorials from Will Gibbons now, but this happens all the time in Keyshot. I use the Geometry view and the Gizmo hides behind the object itself that I am attempting to move. It can happen in all views (wireframe, shaded, etc.) When I pivot around, I can expose the Gizmo again from time-to-time, which I need to do as that is the only way to find it. But depending on the point of view it usually is hidden. Sometimes, even when visible, I need to turn off Translate and Rotate, for example, to be able to see the Scale.
I have found that this is not dependent on the geometry, or the file. It happens all the time- just seems to be inherent every time I use the Move Tool Gizmo... which is all the time.