About model and data exchange with 3rd party solutions: Revit, Solibri, dRofus, Bluebeam, structural analysis solutions, and IFC, BCF and DXF/DWG-based exchange, etc.
It would be nice to have this feature for archicad 2d tools.
As I understand the workaround it's to save 2d in a dwg file, put it in a block and imported back in AC.