display user profile data

Hello Ana,
You can get data from the user with the following code:

<?php
if ( $user_id = get_post_meta($wpo_wcpdf->export->order->id,'_customer_user') ) {
	$custom_user_meta = get_user_meta( $user_id, '_custom_user_meta', true );
	echo $custom_user_meta;
}
?>

Where you replace ‘_custom_user_meta’ with the meta field name of your second billing address field.

Hope that helps!

Ewout