It would be very helpful to have a set of icons available in the menu. The appearance and structure of the menu is key to clients/editors understanding what they’re doing, and having the option to choose icons for the folder, model, and URL menu item types would improve the visual structure and aid recognition.
An example of a product that nails this is Notion — their menu makes it very easy for the developer to communicate the data model to other users. (Unfortunately they don’t have much else, like an API or strict schema).
