Code-Snippets-Functions/Execute a function on a child site/WooCommerce/hide-selected-order-item-meta-from-emails.txt

add_filter( 'woocommerce_order_item_get_formatted_meta_data', 'unset_specific_order_item_meta_data', 10, 2);
function unset_specific_order_item_meta_data($formatted_meta, $item){
    // Only on emails notifications
    foreach( $formatted_meta as $key => $meta ){
        if( in_array( $meta->key, array('_pre_order_date') ) ) // Corrected key name
            unset($formatted_meta[$key]);
    }
    return $formatted_meta;
}