When you normally import a JPEG+RAW photo into iOS, the Photos app will normally treat those two files as one single photo, which you can switch to the RAW photo for editing later on if you’d like.
I just tried out ShutterSnitch and it seems to transfer RAWs fine (which is good- many apps seem to just punt on that and do JPEG!), but when I share them into the main iOS camera roll, they show up as two separate photos. Is this the intended outcome?