The module automatically adds a default canonical url to your product, classification, CMS pages only. By default, the module uses The existing url in the web page because the default canonical url. You can use Ahrefs to solve this concern – just go to the list of pages that link https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html