Six demo BO, nevertheless I couldn't scroll down to base of the side menu to access the module. It is because by default the menu won't scroll, so you can't perspective the links in direction of the bottom. There is a free module available to make the menu scrollable so you https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html