Depth range for Sony ARW compressed raw


I got some data using the latest Sony RX100 VI camera (seems not in libraw list yet). The data should be 12 bits compressed raw, which was confirmed by the Sony support. However, when I use libraw/rawpy to read the raw data (no postprocessing at all). The data range is from 0~16596. Did libraw do any conversion for the data format?

The data is around 20 MB which I cannot attach.

Thank you!