In case useful to others, I've mapped the EXIF info for the various film simulations offered by the Fuji X100F.
You need to read 2 tags (FilmMode and Saturation) to get the full information.
I've used exiftool, a command-line tool, to get this. I am on a Mac but exiftool is freely available on most platforms.
(Now if someone could find out whether whether usage of the built-in ND filter is captured in EXIF...)
# exiftool -m -s -f -FilmMode -Saturation *.JPG
======== Acros+G.JPG
FilmMode : -
Saturation : Unknown (0x503)
======== Acros+R.JPG
FilmMode : -
Saturation : Unknown (0x501)
======== Acros+Ye.JPG
FilmMode : -
Saturation : Unknown (0x502)
======== Acros.JPG
FilmMode : -
Saturation : Unknown (0x500)
======== ClassicChrome.JPG
FilmMode : Unknown (0x600)
Saturation : Normal
======== Monochrome+G.JPG
FilmMode : -
Saturation : B&W Green Filter
======== Monochrome+R.JPG
FilmMode : -
Saturation : B&W Red Filter
======== Monochrome+Ye.JPG
FilmMode : -
Saturation : B&W Yellow Filter
======== Monochrome.JPG
FilmMode : -
Saturation : None (B&W)
======== ProNegHi.JPG
FilmMode : Pro Neg. Hi
Saturation : Normal
======== ProNegStd.JPG
FilmMode : Pro Neg. Std
Saturation : Normal
======== Sepia.JPG
FilmMode : -
Saturation : B&W Sepia
======== astia-soft.JPG
FilmMode : F1b/Studio Portrait Smooth Skin Tone (Astia)
Saturation : Normal
======== provia-standard.JPG
FilmMode : F0/Standard (Provia)
Saturation : Normal
======== velvia-vivid.JPG
FilmMode : F2/Fujichrome (Velvia)
Saturation : Normal