In the level viewport split it into two panels (or more if you want) and select one as a ‘top’ perspective. Then you can move the camera on a 2d only axis.
as far as I know, there’s no crop on a camera’s sensor,
so it’s not possible to do what a maya panzoom does
nor is it possible to do the fake 2D screenshake some camera rigs do with the unreal cameras
off the top I guess you could fake it with render targets and pan a grid with that texture in front of the final recording camera
but I don’t think cameras can do what maya is doing out of the box