Markup can be conveniently checked through schema markup screening Instrument. It will take some time for rich snippets to look in search results, in order that they will not be displayed right away. On the other hand, product and category rich snippets will look only following Google indexes the content https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html