I have Samsung Notes (first), in the settings for the FV-5 program (camera) there is a PNG format, it is also of the RAW type. Maybe this is still a software feature?
The ability to shoot in raw is a software feature or hardware?
In raw, absolutely all digital cameras are removed, but many immediately convert to jpeg and do not allow raw to be extracted, so these are software features.
I use Xiaomi Mi Note, for shooting in RAW I use Mi2raw Cam application. The program is freely available in the Play Market. I process RAW (dng) files in SnapSeed, Photoshop Express or Photo Mate R2. So feel free to add Xiaomi Mi Note to your list. And I think that you can also add Xiaomi Mi Note Pro, because they have the same photosensor, Sony IMX214 CMOS.