How do I hide ‘Order Item’ meta?

In order to hide the order item meta from the invoice, simply add the following filter to your themes  functions.php

 * Hide order itemmeta on WooCommerce PDF Invoices' invoice template.
 * @param array $hidden_order_itemmeta itemmeta.
 * @return array
function bewpi_alter_hidden_order_itemmeta( $hidden_order_itemmeta ) {
    $hidden_order_itemmeta[] = '_wc_cog_item_cost';
    $hidden_order_itemmeta[] = '_wc_cog_item_total_cost';
    $hidden_order_itemmeta[] = '_subscription_interval';
    $hidden_order_itemmeta[] = '_subscription_length';
    // end so on..
    return $hidden_order_itemmeta;
add_filter( 'bewpi_hidden_order_itemmeta', 'bewpi_alter_hidden_order_itemmeta', 10, 1 );<br>

Please test the functionality on a development environment of your website. If it ceases to work, please revert back to the original state of your website and follow the tutorial again.