I shot a test photo with my Fuji X-H2 shooting RAW+JPEG (Normal + Lossless compressed RAW in the settings). I import the .jpg and .raf files into Photomator at the same time to generate a RAW+JPEG asset. I shot the photo with a black and white film simulation.
With Photomator set to "Open RAW by default", I open the asset and see the colored RAW with the info panel showing that it is the RAW. I suspect however that I have the JPEG opened considering the file size.
I make edits to the RAW and save the edits. When I open the image back up and pull up the info panel, it now shows that I am looking at a JPEG + SIDECAR.
When I change Photomator to "Open JPEG by default", it pulls up a JPEG of my edited RAW and not the original shot JPEG. I cannot find a way to see my original JPEG unless I revert the edits.
This behavior does not occur when I edit just a RAW file, it instead shows RAW + sidecar. Also, the RAW file size is of the proper size now.
It should also be noted that when the asset is viewed in Apple Photos, which does not support compressed Fuji RAWs, the edits I made to the RAW in Photomator changes the JPEG in Apple Photos.
So in conclusion, unless I do not understand the point of RAW+JPEG (which is to conveniently save both files in one asset and be able to edit and access each file independently) or how Photomator handles these files, it would seem that this feature does not work properly.
Please let me know if I am doing something wrong, because I am at a loss.