Only canonical URLs should be listed in the sitemap, While Google suggests that doing so is actually a weak canonicalization signal. Rel=canonical really should only seem during the of the document. A canonical tag within the section of the page will be overlooked. Steven2105Steven2105 55055 silver badges2323 bronze badges three https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html