Markup may be quickly checked through schema markup testing Device. It will take some time for rich snippets to seem in search engine results, so they is probably not exhibited right away. Having said that, product and category rich snippets will show up only right after Google indexes the content. https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-google-rich-snippets-json-ld-opengraph-twitter-tags-schemaorg.html