Photomator integrates with Photos library perfectly! If you shoot RAW edit ONLY in Photomator. In that case Photomator saves the edits in the original file (Asks for authorization each time, a bit a annoying but that’s an Apple thing). Non destructive edits. PM also saves a .photo file in it’s own folder in iCloud, containing all edits. As Long as you don’t delete that file all edits Sync between iOS and macOS and are non destructive.Do the Photos "live" in Apple Photos or within Photomator? when you make an update in Photomator does it save another JPG/TIFF (if a RAW file to begin with) and import back INTO Photos?
The files can get really big though.
If you are done with your edits just delete the .photo file in the PM folder. Won’t affect the original in Photos and you can always revert to the original in Photos.
PM has totally replaced Lightroom for me! Amazing App!