Take note that When your store has by now been indexed by Google or any other internet search engine, it'd choose some time for your changes to look while in the search results... You could have to Wait and see! The title of the store by itself is ready in https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html