There are two RAW Power folders. One is stored in your home folder and it is where RAW Power stores editing information when you are not using the photo library. The one in iCloud Drive is not currently used. When you use the photo library, it stores everything there. That way it syncs over iCloud Photos and integrates with Photos properly.
I just found a bug in the Share to RAW Power extension on iOS – it will be fixed in the next update. Share to RAW Power will copy a photo into your library (and place it into a special album for easy access).