woo_dpd_portugal_label_issued.php

<?php

// You need this plugin: https://ptwooplugins.com/product/dpd-portugal-for-woocommerce/

// Change order status after issuing label
add_action( 'woo_dpd_portugal_label_issued', function( $order_id ) {
	$order = wc_get_order( $order_id );
	$order->update_status( 'completed', 'Order automatically set to Completed after issuing DPD label' );
} );