You have to see it in action, especially in combination with Harmonize, to see what this new bit of magic can do.

This new feature is available in Photoshop v27.6. If you don't have that version, use the Creative Cloud app to update your version.

Photoshop has always had a rotate capability, but that merely allowed you to rotate an object in 2D space around a point. This new Rotate Object interface lets you rotate an object in three dimensions and generates the part of the image you can't see.

Rotate Object is a menu command under the Edit menu. It's also available on the contextual menu bar.