How do I fix the add to cart button missing in WooCommerce?

If the WooCommerce add to cart button is missing, first confirm the product is purchasable. Check product type, price, stock status, and catalog visibility. If it is external or grouped, the button may differ. Switch to a default theme temporarily to rule out theme conflicts. Disable plugins one by one to find conflicts, especially custom cart, caching, or page builder plugins. Verify WooCommerce templates were not overridden incorrectly in your theme. Re-save permalinks and clear all caches. Ensure you did not enable “Catalog mode” or hide prices. Check custom code removing hooks like woocommerce_after_shop_loop_item. Finally, update WooCommerce, theme, and PHP version for compatibility.