In additon to elisolution's response above, this also checks irrespective of whether we are actually on the home site (not just whether the canonical was set or not). I examined this Resolution a tad and so far as I can see, it really works as expected. Otherwise, be sure to let https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html