Could it be a workaround to throw AdobeDNG converter at them? I'm not sure if converts from DNG to DNG though.
My GH6 produces RW2 RAW that cannot be read by almost anything but Adobe products.
The Windows application recommended by Panasonic is “SILKYPIX Developer Studio” and it is bad. Very bad.
I don't understand why these camera manufacturers don't contribute to dcraw or libraw.