Changing “availability” in schema output on ceratin products

Yoast SEO does not output product schema. If you are using WooCommerce, they offer the availability schema. To adjust WooCommerce’s schema, please contact their support team for assistance.

We do offer an add-on called Yoast SEO WooCommerce that intergrates Yoast and WooCommerce schema. This hook into the schema WooCommerce provides and adjusts, as needed.

Hello, thanks for the answer, i have found the solution here: https://github.com/woocommerce/woocommerce/wiki/Structured-data-for-products#customizing-structured-data-using-woocommerce-filters

The code i needed to change availability is:

 
add_filter('woocommerce_structured_data_product_offer', function(){
    $markup['availability'] = 'https://schema.org/InStock';
    return $markup;
});