For R12.2 cloning detailed steps please refer:
Section: Cloning Oracle E-Business Suite with Rapid Clone
You may also review:
Cloning Oracle E-Business Suite Release 12.2 with Rapid Clone (Doc ID 1383621.1)
Hope this helps!!!
MOS Doc 1383621.1 doesn't cover the steps of 12.2 cloning (unlike 11.5.x and 12.1.x Rapid Clone docs) and you can find the details in the Setup Guide (Chapter 17 -- Cloning Oracle E-Business Suite with Rapid Clone) which is referenced above.
Is MOS Doc 1383621.1 incomplete or incorrect ?
As I mentioned above, for 12.2 cloning the cloning steps are not covered in MOS Doc like the case with 11.5.x/12.1.x and those steps are now covered in details in Oracle Setup Guide.