6 demo BO, however I could not scroll all the way down to bottom of the side menu to entry the module. It's because by default the menu would not scroll, in order to't view the inbound links in the direction of the bottom. There exists a free module available https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html