In additon to elisolution's answer above, this also checks regardless of whether we are actually on the house page (not just whether the canonical was established or not). I tested this solution a tiny bit and in terms of I can see, it really works as predicted. In any other case, https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html