The camera does not follow the pawn :(
I think you're static mesh is just running around without the collision component, spring arm camera or anything since nothing is below it in the hierarchy.
rather than simulating physics on the mesh, simulate physics in the sphere collision component and apply the torque and physics stuff to that. just turn off collision in the static mesh.
or make the mesh the root and delete the collision component.
then your camera should start following the ball and spinning like crazy since it inherents rotation, so remember uncheck the boxes in the spring arm.
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