Customers not listed under Woocommerce>customer menu

To list the customers under Woocommerce>customers tab, import the orders from the older site. WooCommerce automatically loads the customer data from the order details.
Implement the following steps for a clean and clear customer list.
1. Export the orders from the old site.
2. To Import the order data, click Analytics>Settings from the dashboard. In the Import historical data section, select All.
3. Now click on Start button.
4. Check the Customer tab to see the added customer list.