The fact that the Animation workspace has its own similar-but-unique browser makes Fusion 360 UI seem inconsistent and fragmented. An example of a related issue: If you show a sketch in the model workspace, you may see that sketch in the Animation workspace. To turn it off, you have to go back to the animation workspace or change Object Visibility in the display options. This is because the browser doesn't list sketches. The current method seems like a strange workaround and would be much more fluid, consistent, and logical if the browser looked the same as it does in the Render and Model workspaces. (I do understand that only components can be animated and that was probably the initial impetus for having a unique browser in this workspace).