Six demo BO, on the other hand I could not scroll down to base of the aspect menu to obtain the module. This is due to by default the menu isn't going to scroll, to help you't look at the backlinks towards the bottom. You will find there's free module https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html