how to fix search consol HasMerchantReturnPolicy" And "ShippingDetails" missing issue \

Shopify Discussion
6

You can modify your structured data by adding (change what you need):

"hasMerchantReturnPolicy": {
          "@type": "MerchantReturnPolicy",
          "applicableCountry": "US",
          "returnPolicyCategory": "https://schema.org/MerchantReturnFiniteReturnWindow",
          "merchantReturnDays": 7,
          "returnMethod": "https://schema.org/ReturnByMail",
          "returnFees": "https://schema.org/FreeReturn"
        },