Only canonical URLs must be shown inside your sitemap, Though Google says that doing so is really a weak canonicalization sign. Enable by default. If you permit this option, new products will automatically be activated whenever you develop them. Also see this explanation for why hreflang should not be utilized https://bookmark-nation.com/story18662584/not-known-factual-statements-about-automatic-hreflang-tags-canonical-tags-all-pages-seo