foreyes.com

1. In stock or notmissing on 25 of 25

   State stock as a schema.org value, such as https://schema.org/InStock, for each variant.

2. Conditionmissing on 25 of 25

   Say each product is new, or how it is used or refurbished.

3. Shippingmissing on 25 of 25

   State what delivery costs, where it goes and how long it takes, once for the store or on each offer.

4. Returnsmissing on 25 of 25

   State the return policy: the window, the countries and who pays, once for the store.

A count of fields says what a page's data states, read before any script runs. It does not decide eligibility: Merchant Center and Google's own review decide whether a product shows in merchant listings, Universal Cart or any other Google feature.