The most trivial (because it’s somewhat ham-fisted) way in this very setup would be to:
Add a Child Actor Component with a Child Actor containing just a Camera Component and blend between the two. It assumes you do not want to move or control any cameras during the transition.
and the inspect camera attached to none
This is not possible. The component is attached. You’d need to dig into transform inversion to solve it with math or toy with attaching / detaching but this can open another can of worms altogether. Depending on how complex the camera systems get, it may / may not be worth the fuss and you could rely on blending only. But we’d need to know the exact hierarchy of component attachment, we can’t see it anywhere above.