UWP: Where is the Cache Folder of OneNote for Windows 10?

The cache folder of OneNote for Windows 10 is hidden deep.

Gem Menu for OneNote UWP offers a menu item to open the cache folder of OneNote for Windows 10, to facilitate your use.

Cache Folder Menu Item of Gem

The menu item located in: Gem Menu for OneNote UWP -> "Gem" menu -> "Cache Folder" menu item.

OneNote UWP Cache Folder

The Gem Menu opens the OneNote cache folder with Windows Explorer.
Here, we can see the OneNote for Windows 10 data files.