Ok I checked this now and if I understood correctly, it’s like this:
It is possible to get the 50MP RAW but only if Nothing “allows” it. In the case of the Phone 3, Nothing only exposes 12MP to the Camera2 Api (which is used by third party apps). So, aside from the official Nothing Camera App, no third party cam app has access to ANY 50MP image using the camera, even for jpegs. So we only get the pixel binned version of the sensor output.
I get it if they are afraid of people filling their phones with 100MB+ raw files through the official camera app, especially since almost no other manufacturer does it, but it would be nice for enthusiasts or insane people to have access to the full 50MP RAW steam through third party apps. But this will probably not happen I think.