You can manage collections you don't own

The Community Site has management buttons that you can see in collections you don't own. For example, these buttons or controls may change the thumbnail of a collection, removing one project from a collection, or editing the description of a collection. These don't work if you're not the collection owner.
Screenshot 2024-06-05 165646

Notice the dashed outline. It means it is editable. Just it could not be edited actually.

This is technically a website bug that could be fixed by making those buttons and controls not visible or editable.