Only canonical URLs must be stated as part of your sitemap, Whilst Google claims that doing this is a weak canonicalization signal. Canonical tags are not the only solution to declare a website page’s canonical. You should use three other procedures: You may also use Screaming Frog’s Web optimization Spider https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html