Recreating the same effect over multiple images seems easy. Just make a ‘style’ of the edit, which you can then apply to a whole collection in the light table view and export.
The flat scans seem fine for this since they allow you to do the saturation and contrast like you want.
Remember, film has no ‘correct’ look. Only the look you want / like.
But doing a quick vibrancy / saturation edit in color balance rgb in darktable seems easy enough, and there is a contrast slider there as well.
More technical, but you can also use ImageMagick or another tool to merge all the scans into one collage / contactsheet, of small versions of the scans.
You then have one image to edit and you can see what your changes are doing to all the frames of the roll. Save presets of your edits, apply them to the original scanned pictures and export.