By default it fetch the publish products` but if you want to fetch with more status you can modify this filter:
function modify_product_status($product_status) {
// Add 'draft' status to the array
$product_status[] = 'draft';
return $product_status;
}
add_filter('wbps_fetch_product_status', 'modify_product_status');
the above code returns publish and draft products.