Restore Missing Product Listings

The products on my website have suddenly disappeared from every catalogue and category page, even though nothing was changed on my end. Stock, prices and images are still in the database / back-office, but the front-end shows blank sections where items should appear.

I need a developer who can:

• Trace why the product-listing logic is failing—whether it’s a template error, database query, cache issue, plugin conflict or something else.
• Reinstate full product visibility across all browsers and devices without breaking checkout, SEO-friendly URLs or existing styling.
• Provide a short summary of what was fixed so I can avoid the problem in future.

Acceptance criteria
1. All products display correctly on listing and search pages.
2. Thumbnail, price and “Add to Cart” button load without delay.
3. No new console errors or broken links after the fix.

If you have solid troubleshooting experience with e-commerce stacks (WordPress / WooCommerce, Shopify, Magento, custom PHP—whatever the culprit turns out to be), please outline how you would approach the diagnosis and an estimated turnaround time.