Custom Order Status Generator

<?php
// Generated with WP CodeKit — powered by GrowQuest (https://growquest.io).
/**
 * Plugin Name:       Awaiting pickup order status
 * Description:       Registers the wc-awaiting-pickup order status.
 * Version:           1.0.0
 * Requires PHP:      7.4
 * Requires Plugins:  woocommerce
 * Text Domain:       acme
 */

defined( 'ABSPATH' ) || exit;

/**
 * Register the wc-awaiting-pickup post status.
 */
function acme_register_order_status() {
	register_post_status(
		'wc-awaiting-pickup',
	array(
		'label'                     => _x( 'Awaiting pickup', 'Order status', 'acme' ),
		'public'                    => false,
		'exclude_from_search'       => false,
		'show_in_admin_all_list'    => true,
		'show_in_admin_status_list' => true,
		'label_count'               => _n_noop(
			'Awaiting pickup <span class="count">(%s)</span>',
			'Awaiting pickup <span class="count">(%s)</span>',
			'acme'
		),
	)
	);
}
add_action( 'init', 'acme_register_order_status' );

/**
 * Add it to the list WooCommerce shows everywhere — the admin dropdown,
 * the orders list filters, and the bulk "Change status to" actions.
 *
 * @param array $order_statuses Existing statuses, in display order.
 * @return array
 */
function acme_order_statuses( $order_statuses ) {
	$new_statuses = array();

	foreach ( $order_statuses as $key => $status ) {
		$new_statuses[ $key ] = $status;

		if ( 'wc-processing' === $key ) {
			$new_statuses['wc-awaiting-pickup'] = _x( 'Awaiting pickup', 'Order status', 'acme' );
		}
	}

	return $new_statuses;
}
add_filter( 'wc_order_statuses', 'acme_order_statuses' );

/**
 * Give the status its own colour in the orders list.
 */
function acme_order_status_badge_css() {
	?>
	<style>
		mark.order-status.status-awaiting-pickup,
		.order-status.status-awaiting-pickup {
			background: #f0ad4e;
			color: #ffffff;
		}
	</style>
	<?php
}
add_action( 'admin_head', 'acme_order_status_badge_css' );