For user order item information

Hello,

I am using a php plugin to write php in a page that I need.
Is there a nice and clean way to get the item information for a user ?

I am using a foreach since there will be more users in the long term.

this is what I have now :

<?php
// Array of stdClass objects.
foreach ( $alleKlanten as $user ) {
    echo '<span>' . esc_html( $user->display_name ) . '</span>';

	$customer_orders = get_posts( array(
	    'numberposts' => -1,
	    'meta_key'    => '_customer_user',
	    'meta_value'  => get_current_user_id(),
	    'post_type'   => "shop_order",
	    'post_status' => array_keys( wc_get_order_statuses() ),
	) );
	echo "<hr>";

	/**
	 * Verkrijg hier alle order informatie die is doorgezet.
	 */
	foreach ($customer_orders as $order) {

	var_dump(
		$wpdb->get_results( "SELECT * FROM wp_woocommerce_order_items WHERE order_id = {$order->ID} " ));
	}
}

?>

It does return nothing.

https://wordpress.org/plugins/woocommerce/