The level of integration of little electronics (like the LiDAR and the OLED screen) into a print is amazing! I am thinking about an electronic light meter that is coupled to the shutter and saves the current reading to an SD card, so that you could later sync the EXIF data to the scans.

Shameless plug: I have made a website that lists a lot of 3D printable film cameras (including the links to the print files). Feel free to have a look if you are thinking about printing your own camera. Some are really cheap and easy to print.

https://printed.analogcamera.space