Be aware that recommended properties aren't an error, but a warning, and shouldn't have an effect on rich final results exhibiting. Supplying them would support your schema markup, Which explains why They are really encouraged. For example, I might need an everyday post which might print Post schema, some posts https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html