I have uploaded the raw-dng file as it has been generated with the picamera2 library to my Google Drive account.
I think it’s a very good idea to process it with Adobe Lightroom to compare results.
In my case I have processed it with RawTherapee, but I have to say that I have not spent a lot of time in the developing process and, on the other hand, I am not an expert in the use of the program either.
I leave the link for download: