Wait, which simulation was I just using?
Here's how to identify which #sonyfilmsimulation and WB setting you have used from your JPG's metadata.
There is just one rule:
Make sure all the FS you have stored in your camera differ in their saturation value by at least 1.
I hardly notice the slide difference in saturation from the original recipe if I have to change it. And of course, you will need a viewer that is not just extracting the basic EXIF data stored with image in the respective JPEG file but also the so-called MakerNotes. On my computer I use XnView MP, which makes use of ExifTool (https://exiftool.org/), and on my phone EXIF Pro does the trick.
Here are just the relevant lines from the metadata that tell me exactly what I did and used.
EXIF
Make SONY
Camera Model Name ILCE-7CM2
Lens Info 135mm f/1.8
Lens Model FE 135mm F1.8 GM
Exposure Program Aperture-priority AE Exposure Time 1/80
F Number 2.2
ISO 3200
Exposure Compensation -2.3
White Balance Manual
MakerNotes
Saturation +x (Well, x will be numerical value, of course.)
WB Shift AB GM 7 -1
WB Shift AB GM Precise 7.00 -1.00
Color Temperature 4700
Image Stabilization On
Vignetting Correction Off
Lateral Chromatic Aberration Auto
Distortion Correction Setting Off
Focus Mode DMF
AF Area Mode Setting Center
Metering Mode 2 Multi-segment
Saturation +x tells me which #sonyfilmsimulation I used, since I made sure that none of the ones I store in my camera has the same saturation value. Plus, I know the color temperature was set to 4700 K with a shift of A 7.00 / G 1.00 (negative values meaning a shift to blue or greeen, resp.), which might not be the value recommended for this FS. But one has to adjust the WB according to the conditions anyhow. So I like the fact that I do not need to write it down every time I press the shutter, like for the picture shown below from which I extracted the metadata listed above.
Hope that helps.
There is a lot more interesting information in the MakerNotes, like sharpness and clarity settings, but also things like ambient temperature (which, I guess, is the temperature of the camera body).
(https://www.instagram.com/p/DFgD_G8IIT1/)
Luckily, there is not sufficient information to recreate a FS from the MakerNotes. ;) And another thing: depending on the editor you are using to crop or rotate your image after retrieving it from the camera/card, you may mess up the MakerNotes. In particular, the AB GM shift will be affected by such edits.