Observe that If the shop has by now been indexed by Google or any other search engine, it might take some time for your personal modifications to appear in the search engine results... You may have to be patient! By default, PrestaShop's deep URLs (that is certainly, unique webpages in https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html