Please take a look at the following possible cases:
Does the product have the correct Shopify inventory settings to be available for pre-order? Read more.
Visit Products section of the app and check if pre-ordering is enabled for this product.
Check if the "Add to cart" button selector on the app's Settings page is selected.
Related articles
Related articles appear here based on the labels you select. Click to edit the macro and add or change labels.
