Hello, so the screen does not rotate automatically on a laptop or mobile...

No, this is not possible, the screen also has "control buttons" on the short edges, which react when the screen is placed on the narrow edges.

The foot at the rear is only designed for a transverse view...

No, the USB-C cable would also be far too short. I have already tried a longer one to be more flexible. But it didn't work.

Hello, no unfortunately the picture does not rotate when the screen is turned up.

No

It has a foot that folds backwards so that it stands horizontally. I have never tried to stand it vertically.