6 demo BO, on the other hand I could not scroll all the way down to bottom of the side menu to obtain the module. This is due to by default the menu does not scroll, so you can't check out the links towards the bottom. You will find there's free https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html