Support for child navigation items to allow dropdowns in the main navigation pane. If you have a large wiki, it can be hard to organize your pages without some type of collapsible navigation.

The integration of a tool like https://diagrams.mingrammer.com/ could allow users to version and edit diagram directly as code in the documentation page and easily keep track of any change has long has there's a git back-end

Currently when moving or renaming a page, all existing links point to the old page. The correct behaviour would be to update all links to the new page, either optional or explicit.

When a user created or edited a page, it wont publish right away, rather have a admin or higher lever user to approve the modification, then publish.

A user can opt in to be notified when the contents of a page are updated.

Can comments be position in the text. Or some kind of markdown symbol for comments located to where it is referring to. Comment can then be show or hide, with right (if possible). Actually, I think the current quoted can be used for comment if it can hide/show, and display who make to comment. (Can be some extra data in the block quote markdown.)

Ability to dynamically list child pages or siblings of a parent page. Perhaps with {.links-list} style. Would be very useful for landing pages for example. Exemple with WordPress: https://wordpress.org/plugins/page-list/

A modular notification system. Users, User groups, Admins can be notified about events. For example: Content events (new page, updated page, deleted page) Admin events (new registration, failed login attempts, failed git sync,....). See also https://wiki.js.org/feedback/p/admin-notification-of-registrations and https://wiki.js.org/feedback/p/notifications-for-page-updates

To be able to open images that are inserted on the page in a popup/modal window or in a FancyBox/Lightbox. Also, to have varius types of galleries, sliders and slideshows for the images.

12h /24h time option would be nice. Not everybody is used to pm/am time