Set Shipping And Billing Address From Order To Customer Address In Magento 2

For a guest checkout to set the addresses, you may require the method to set shipping and billing address from order to customer address in Magento 2. 

It becomes easy for the users to register using auto account creation for the stores allowing guest checkout. Thus, at the time of account sign up an address is required that is fetched from the shipping and billing address used for the checkout. 

It may even happen that the registered customers makes use of different shipping address than that used at the time of sign up. 

For more information, you can refer the article at: https://meetanshi.com/blog/set-shipping-and-billing-address-from-order-to-customer-address-in-magento-2/