If the ZIM file is not too large, it can work with this:
https://github.com/JuanJakobo/Pocketbook-ZIM-Reader
Cave: Splitting the ZIM destroys the search index therefore filesize is limited to under 4GB.
See here:
https://github.com/JuanJakobo/Pocket...eader/issues/1
Kiwix doesn't work on unrooted PB since localhost is deactivated. You could activate it on an rooted device via:
ifconfig lo 127.0.0.1 up
but even after this my older tests resulted with my PB trying to get online while connecting to localhost.