Custom text info on product page

-- HikaShop version -- : 6.1
-- Joomla version -- : 5.3.x
-- PHP version -- : 8.4.x

I want to show the "estimated delivery time" on the product page. For this purpose I think I have to create some type of custom field. It must be a text field for the backend (input) and has to be shown as text information on the frontend (product page). So I guess I should use the table "article" - but what field type? The only "text" type seems the "custom text" field, but this shows only one (!) global text information. But I have to set an individual text per product. Please help!