Collapsible directory listing in sidebar

[Turdari]

It is convenient to use mobile application's collapsible list ( even it has only level 1 collapsible list )

but I found that this feature not exist in web browser.

As I'm using almost 1500 note pages, directory structure is complex

Obsidian users, or else notion users may need this feature, and can easily migrate to nextcloud note.

Can you add these features?