Automatticaly selecting curves of the opening in geometry

For the section box case you can do this with the Element View Geometry component.

When it comes to exporting the mesh of the analysis into Revit, I have never done it or seen it. You could definitely export the text but I am not sure it would be very helpful without the mesh. All the colleagues I know that work with these kinds of analysis never export the mesh to Revit, but I understand that it could be helpful.