WooCommerce Bulk send order details

functions.php

<?php
add_action( 'bulk_actions-edit-shop_order', 'woocommerce_bulk_actions_order_emails', 10 );
function woocommerce_bulk_actions_order_emails( $actions ) {
	$actions['send_order_details'] = __( 'Email invoice / order details to customer', 'woocommerce' );
	return $actions;
}

add_filter( 'handle_bulk_actions-edit-shop_order', 'woocommerce_bulk_actions_order_emails_handle', 10, 3 );
function woocommerce_bulk_actions_order_emails_handle( $redirect_to, $action, $post_ids ) {
	if ( $action !== 'send_order_details' ) {
		return $redirect_to;
	}

	foreach ( $post_ids as $post_id ) {
		as_schedule_single_action( time(), 'woocommerce_transactional_email_bulk_process', array( 'order_id' => $post_id ) );
	}

	$redirect_to = add_query_arg( 'send_order_details_queued', count( $post_ids ), $redirect_to );

	return $redirect_to;
}

add_action( 'woocommerce_transactional_email_bulk_process', 'woocommerce_transactional_email_bulk_process', 10, 1 );
function woocommerce_transactional_email_bulk_process( $order_id ) {
	if  ( $order = wc_get_order( $order_id ) ) {
		do_action( 'woocommerce_before_resend_order_emails', $order, 'customer_invoice' );

		// Send the customer invoice email.
		WC()->payment_gateways();
		WC()->shipping();
		WC()->mailer()->customer_invoice( $order );

		// Note the event.
		$order->add_order_note( __( 'Order details manually sent to customer.', 'woocommerce' ), false, true );

		do_action( 'woocommerce_after_resend_order_email', $order, 'customer_invoice' );
	}
}
add_action( 'admin_notices', 'woocommerce_transactional_email_bulk_process_notice' );
function woocommerce_transactional_email_bulk_process_notice() {
	if ( !empty( $_GET['send_order_details_queued'] ) ) {
		printf( '<div class="updated"><p>%d emails added to email queue for immediate sending!</p></div>', intval( $_GET['send_order_details_queued'] ) );
	}
}