Only canonical URLs really should be detailed in the sitemap, although Google states that doing so is usually a weak canonicalization signal. Hreflang tag #1 will be the self-referencing entry in this case. And the worth on the rel attribute needs to be “alternate” – it simply cannot be replaced https://socialfactories.com/story4260888/not-known-factual-statements-about-automatic-hreflang-tags-canonical-tags-all-pages-seo