How to input content in Specifications-tab when product-view is set to "tabular"

-- HikaShop version -- : 4.7.2
-- Joomla version -- : 4.3.1
-- PHP version -- : 8.1
-- Browser(s) name and version -- : Microsoft Edge 13.0.1774.42 (Officiële build) (64-bits)

Using HikaShop Starter

On front-end product page , Hikashop shows 2 tab-items below the product image and charactristics-selection:

1. Description
2. Specifications

The Description tab is nicely filled with the description I entered in the back-end product management area for the selected product variant.
The Specifications tab however is empty. In the back-end I cannot find any area to input content for this tab, nor can I find an option to disable this tab. See attached gif

How can I input content for this Specifications tab in the product administration? Or how can I disable it in the settings? (without an CSS-trick)