Add WooCommerce Order Numbers to Orders in SearchWP

searchwp-customizations.php

<?php

// Add WooCommerce Order Numbers to WooCommerce Orders.
// @link https://searchwp.com/documentation/knowledge-base/search-woocommerce-orders/
add_filter( 'searchwp\entry\data', function( $data, \SearchWP\Entry $entry ) {
	$my_extra_meta_key = 'searchwp_order_number';
	$my_extra_meta     = $entry->get_id() . ' order-' . $entry->get_id() . ' o-' . $entry->get_id();

	$data['meta'][ $my_extra_meta_key ] = $my_extra_meta;

	return $data;
}, 20, 2 );