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.

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.

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.

Although a wiki is a collection of pages, often they are organised in a tree structure. If you want to move a page that is at the top of a subtree and all pages below it, that is very cumbersome. Adding a "move tree" function would greatly simplify moving, or renaming, subtrees and keep consistency.

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

Looking for a nice way to share (formatted) wiki pages with external links intact

Images should be pasteable via clipboard ctrl+V as a shortcut, similar to how Github's MD editor works. This would be a gigantic time saver.

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

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/

Allow a page on the wiki to display which other pages on that wiki are linked to that page.