Missing hasMerchantReturnPolicy in Offer JSON-LD for Google Merchant listings

Hi Nicolas.

I’ve identified a behavior in HikaShop’s structured data that may need review to improve compatibility with Google Merchant listings.

Context:

* On my product pages, HikaShop generates a JSON-LD block of type `ProductGroup`, with variants inside `hasVariant`.
* Each variant is generated as a `Product`, and each one contains its own `offers` block of type `Offer`.
* Inside each `Offer`, fields such as `url`, `itemCondition`, `priceCurrency`, `price`, and `availability` are correctly included.

Observed issue:

* In Google Search Console, within the “Merchant listings” report, I am getting warnings like:
`Missing field "hasMerchantReturnPolicy" in "offers"`
* I checked a specific affected URL, and the warning points directly to the `Offer` block generated by HikaShop.
* However, Google’s Rich Results Test does not flag this as a critical issue (only optional fields like `priceValidUntil`), but Search Console still reports the missing `hasMerchantReturnPolicy` in `offers` under Merchant listings.

My questions:

* Do you plan to add support for `hasMerchantReturnPolicy` inside `Offer` in the product/variant JSON-LD?
* If not, what would be the recommended way to implement it in HikaShop without modifying the core?

It would also be helpful to know if you plan to support:

* a global return policy at `Organization` level
* and product-level exceptions (e.g. personalized products), in a way compatible with Google Merchant Center / Merchant listings.

If needed, I can provide a real affected URL and the exact JSON-LD snippet generated by HikaShop.

Thank you.

Nicolas, hi again,

I’ve noticed a very similar warning in Google Search Console related to the same `Offer` structure:

`Missing field "shippingDetails" in "offers"`

This appears in the same “Merchant listings” report and affects the same product pages.

So it seems that the issue is not limited to `hasMerchantReturnPolicy`, but rather that the `Offer` schema generated by HikaShop is missing several recommended fields for Merchant listings, such as:

* `hasMerchantReturnPolicy`
* `shippingDetails`

Both are marked as non-critical, but they are consistently reported across a large number of products.

This reinforces the idea that the current `Offer` implementation may not be fully aligned with Google Merchant listings requirements.

Would it make sense to consider adding support for these fields (especially `shippingDetails`) in a future update, or providing a built-in way to extend the `Offer` schema safely?

Thanks again.