@Holo, i can be done if you turn on the camera in eg. your top view which is used later in the detail. Once the camera is on for that top view, go to a perspective viewport, select the three camera points in the camera frame and relocate the gumball to the camera target. Now enter your rotation (using the gumball widget) and save this view eg. using the name “rotated”.
Finally make the detail view active in the layout, then switch to the “rotated” view.
EDIT: it also works just by double clicking the detail and entering the camera rotation in case if you know the angle in degrees: