I use Sony's Playmemory Mobile to transfer RAWs (i.e. ARWs) from my a6300 to my Android (v8.1) phone via Wifi. All apps are up to date.
The RAWs are saved to the SD card.
When I go to "Add Photo" in my Android LR CC, I can navigate to the appropriate device folder, see the pictures, select the pictures, and click "add" - but then nothing happens.
My current workaround is to go to Google Photos, navigate to the device folder where the RAWs are stored, select them, and "share" them to the "Add to Lr" link. That works 9/10 times (even with a couple of hundred MB worth of pictures).
It is not a life-or-death situation, but a bit tedious, as it adds another step to the process (that already involved the app to get the pictures to the phone).