Parent Category export

Hi, when exporting a datafeed for a Facebook shop from the Woocommerce database, I have set the Parent Category value to be exported as a Facebook attribute named Product Categories [product_type], but after exporting this column does not contain any values (only the column name). I want the main categories to be assigned to the products (very main categories). For example, the whole path of categories to export works when I choose Product Local Category [Category Path], but I only need the main categories. I tried xml and csv. Is this possible through your plugin? Thank you