Pluggin for making table of content based on folders in cbz-file?

When I upload a webtoon (cbz-file), the calibre reader creates a table of content. But this TOC just counts the webp-files. Is there a pluggin or a method that calibre automatically takes the foldernames as chapters? I do not wish to do it by hand for every chapter for every webtoon.

File structure:
manga.cbz
> Ch. 1 - ... (folder)
-- 001.webp
-- 002.webp
...
> Ch. 2 - ... (folder)
-- 001.webp
...

Desired table of content:
Ch. 1 - ...
Ch. 2 - ...
...