Add "show more" to the "Techniks" template module for Opencart store

The online store uses the "Technicals.Commodities in Blocks" module. You need to add a "Show More" button with the loading function of items when you press, i.e. by default display 6 and when you press the button show another 6, etc. until you run out of items in the category. On the site mrshaverma.ru this module works directly under the slider on the main page