While AutoCAD doesn't "report" on an unfold automatically, you can generate general reports once you have your geometry: Help with unfolding a surface - Autodesk Forums
Despite these limitations, a well-executed unfold in AutoCAD 2021 serves as a bridge to fabrication. The resulting 2D polylines can be: Unfold Surface Autocad -2021-
AutoCAD 2021’s flagship command for this task is . Introduced in earlier releases but refined by 2021, this command projects and flattens selected 3D surfaces onto the WCS (World Coordinate System) XY plane. However, a common misconception is that SURFACEFLATTEN performs a true geometric unfolding. In reality, it creates a flattened representation by sampling the surface at a specified resolution and projecting those points downward. The key parameters include: While AutoCAD doesn't "report" on an unfold automatically,