Hello @brigittexo
The vendor name should be replaced by the Dokan plugin. Are you using the Dokan Invoice?
About the PI date and time, try this:
add_action( 'wpo_wcpdf_after_order_data', 'wpo_wcpdf_pi_date_time', 10, 2 );
function wpo_wcpdf_pi_date_time ($template_type, $order) {
if ( !empty($order) && $template_type == 'invoice') {
?>
<tr class="delivery-type">
<th>Delivery Type:</th>
<td><?php echo $order->get_meta('pi_delivery_type'); ?></td>
</tr>
<tr class="delivery-date">
<th>Delivery Date:</th>
<td><?php echo $order->get_meta('pi_delivery_date'); ?></td>
</tr>
<tr class="delivery-time">
<th>Delivery Time:</th>
<td><?php echo $order->get_meta('pi_delivery_time'); ?></td>
</tr>
<?php
}
}
If you never worked with actions/filters, please read this documentation: How to use filters
