Google Will Now Disapprove Free Listings for Products Marked as out of Stock in Merchant Center and Available on Website
https://support.google.comFree standard listings allow merchants to show out of stock products to users. To ensure good user experience, Google will now preemptively disapprove free standard listings for products that are marked as out of stock in the product data in Merchant Center, but are in stock on their landing pages.
To avoid having your products be preemptively disapproved, make sure that your Merchant Center product data’s availability values accurately reflect each product’s availability on its corresponding landing page.