In order to determine why a specific product is not on the website, do the following:

1. See if the SKU exists on the admin.
2. Go to the Shopify admin > Products
3. Search for the appropriate SKU (keep adding leading 0s for validation. Example if the SKU is 1234, add 01234, 001234, etc.)
4. If the product exists, check if the product has an image. If it does, see if the product has the 'has-image' tag.
5. If it does, see if the product has inventory.
6. If all of these pass - publish the product on the site and see if the merchandising (tags + collections) are correct.
7. If not, DO NOT publish the product and assign to Nach for tags, collections, images. And Terry / MMS for inventory.