Folder View Settings - Back Up and Restore in Windows offers a BAT file for backing up and restoring your folder settings. The backup portion of this BAT file saves the following registry entries:
From looking at my own registry, the list of individual custom folder views appears to be in:
BagMRU is a nice unique search term, which uncovers Explaining the Bags/BagMRU registry tree (trying), which in turn links to the following utility:
That doesn't appear to have been updated for Windows 10, but 10 seems to use the same setup as Windows 7. Running it on my machine, I do indeed get a list of all my individual folder settings.
Clearly this is possible. I just need to sit down and fiddle with it.