Right now QField already stores a bunch of exif tags when taking a photo (https://docs.qfield.org/de/reference/exif/).

It would be nice if you could adjust which tags get stored. For example for security reasons you might not want GPS data or so to be stored in the image.

It woulld also be nice to be able to store additional tags.

For example support for XPAuthor and XPKeywords would be nice for organising images and Copyright.

For additional tags it would be most usefule to utilize internal variables (e.g. photographer=* for XPAuthor) and fields (e.g. "stream" for XPKeywords).

The keywords for example would be helpful for searching for images outside of QGIS/QField.