Only canonical URLs should be outlined inside your sitemap, Despite the fact that Google suggests that doing so is really a weak canonicalization sign. If none of they are applied, Google will depend on other indicators like hreflang, internal links, and URL size to pick a canonical to suit your https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/31857-automatyczne-google-rich-snippets-json-ld-opengraph-seo.html