wc-anon-cli.php

<?php

namespace YourVendor\WooCommerce_CLI;

use WP_CLI;
use WooCommerce;

function anon_orders( $args, $assoc_args ) {
	$order_ids = wc_get_orders(
		[
			'limit' => -1,
			'return' => 'ids',
		]
	);

	foreach ( $order_ids as $id ) {
		$order = wc_get_order( $id );

		if ( $order ) {
			do_action( 'woocommerce_remove_order_personal_data', $order );

			WP_CLI::success( sprintf( 'Anonymized order #%d', $id ) );
		}
	}
}

add_action(
	'plugins_loaded',
	function () {
		if ( class_exists( WP_CLI::class ) && defined( 'WP_CLI' ) && class_exists( WooCommerce::class ) ) {
			WP_CLI::add_command( 'wc anon_orders', __NAMESPACE__ . '\anon_orders' );
		}
	}
);