Availability mismatch: feed vs page

What Google's message means

The availability you send (in stock / out of stock / preorder / backorder) differs from what Google read on the product page.

Google will not send shoppers to a product it believes is sold out — or list one as in stock that isn't — so the product is disapproved until the values agree.

The fix in Shopify

1. Products → the product → each variant → Inventory: quantity matches what you can ship, and ‘Continue selling when out of stock’ is ticked only if you really take orders for it. Save.
2. If a ‘back in stock’ or pre-order app changes the buy button, the variant's Inventory must say the same: out of stock at 0 unless pre-orders are on.
3. Google re-checks the product at its next crawl (usually within a day); the next RevenueCue scan confirms it's clear.

The fix in WooCommerce

1. Products → the product → Product data → Inventory: Stock status (In stock / Out of stock / On backorder) — or Manage stock with the real quantity. Update.
2. Clear the page cache after stock or price changes (WP Rocket, LiteSpeed Cache, W3 Total Cache → Purge all), or Google reads an old copy of the page.
3. Google re-checks the product at its next crawl (usually within a day); the next RevenueCue scan confirms it's clear.

What it costs while it's down

Every product Google flags this way is out of Google Shopping — no ads, no free listing — until it's fixed. Its listed price is what isn't being shown; a free scan names each product and adds up the listed value at stake.