Eden emulator – some games have no “Export Save” option and no save folder in NAND (why?)

I’ve been using the Eden emulator and noticed something odd with certain games:

• Plants vs. Zombies: Replanted
• Ball x Pit

In these, there’s no “Export Save” button in the save manager like there is with other titles.
And when I check the NAND folder structure, there’s no corresponding save directory at all for them.

Other games work fine — the button appears and the save files are in the expected NAND location.

Is this a known quirk? Could these games be storing progress in a different location, using an internal format, or saving only in RAM/session?
If anyone has figured out where these saves live or how to back them up, I’d love to hear it.

Thanks!