It might very well only be showing you what is in the chroot.
(Which isn't complete.)
Find something you can do that causes the Kindle to reboot to 'diags' -
IIRC. we can jailbreak 'diags'.
and/or
Try viewing the previous "universal" (poison file name) jailbreak in the browser, see if they fixed the browser when they 'fixed' the poison file name method.
That is, this one:
https://www.mobileread.com/forums/sh...d.php?t=186645