My KFX files do not show up when I try to sideload into the Kindle app on my android phone.
The files are sound - converted from EPUB in Calibre, they work perfectly when sideloaded to my Oasis.
I'm definitely putting them in the right place (Books folder, with access permission granted to the app) - MOBI files placed in the same folder show up in the app immediately.
Is anyone else successfully using sideloaded KFX files in the app? There aren't many Google results for the subject. One set of comments on a
Reddit post suggests it's possible,
another suggests it's not...