Blocks with navigation and activity logs take up half of the screen, which is very inconvenient. As a solution, you can make a small button at the top to dynamically collapse these two blocks.

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.

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.

The ability to add custom meta tags / feature image to individual pages to replace the automated snippets.

Sometimes you might have a page that could go under multiple titles. Mediawiki handles this with a thing called "redirects". This kind of feature is espc needed in any large wiki since with multiple editors you can't count on people following the same naming standards.

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/

When the page titles are too long, their names in the sidebar are truncated and not useful. Given that the page name should help to quickly choose the proper page, it could be useful to add a hint (in fact, the html title attribute) showing the full name of the page.

When sharing link on social media theres no thumnail. When we edit a page description it would be nice to have a picture selector for the thumbnail

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.

I use Wiki.js to store public and private pages. The most of part of the private pages are inside specific path but I have many private pages inside public paths. To set as a private page inside public paths I add a tag called "private" and a rule that checks a tag. The private pages inside a private path are not shown on the left sidebar or in the search results but if you search by tag you can see the name of all private pages with the "private" tag and also the tag on the left sidebar. I wish this didn't happen. Thank you!