Can’t add Local Pickup Plus custom field to wpo_wcpdf_after_shipping_address

I’ve added the following code to the template-functions.php as per documentation for my invoice:

add_action( 'wpo_wcpdf_after_shipping_address', 'wpo_wcpdf_location_name', 10, 2 );
function wpo_wcpdf_location_name ($template_type, $order) {
        ?>
        <tr class="location-name">
            <th>Pickup Location:</th>
            <td><?php echo $order->get_meta('_pickup_location_name'); ?></td>
        </tr>
    <?php
}

And I’ve got my invoice set to HTML to view the render faster. But nothing is displayed – not even the ‘Pickup Location’ text.

But if I changed the hook to ‘wpo_wcpdf_before_customer_notes’ I can see the text at least. While custom field value is still not loading.

Is there something else I’m missing?