Navigate the Catalogue menu in the admin portal
Open the Catalogue menu to reach the org's categories and drill into each category's subcategories page.
In the admin portal's left-side menu, Catalogue expands to Furniture, Accessories, Hardware, Building, Finishes, Templates.
Furniture, Accessories, Hardware, Building, Finishes, Templates are not a page but open a flyout of the org's categories (Furniture: Base Unit, Bed, Bookshelf, ..., Wall Unit).
A category opens its page 'Subcategories of - <category>' (/catalogue/furniture/<id>/).