Private Notes Only

Hi,
Looking to export Private Notes only from WooCommerce Orders – seen this solution but that also outputs Order status changes:

"Order status changed from Pending payment to Processing.
This is a private note added
Order status changed from Processing to Completed."

How can the referred code be changed just to show Private Notes Only:

add_filter('woe_get_order_value_private_notes',function ($value, $order,$fieldname) {
	remove_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_order_comments' ) );
	$args  = array(
		'post_id' => $order->get_id(),
		'approve' => 'approve',
		'type'    => 'order_note',
		'orderby' => 'comment_ID',
		'order'   => 'ASC',
		);
	$notes = get_comments( $args );
	add_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_order_comments' )  );

	$lines = array();
	foreach($notes as $note) {
		if($note->comment_author!='WooCommerce' AND !get_comment_meta( $note->comment_ID, 'is_customer_note', true ) ) 
			$lines[] = $note->comment_content;
	}
	return join("\n",$lines);
},10,3);

Many Thanks