WooCommerce

from our developer blog comments (https://developer.woocommerce.com/2025/06/23/woocommerce-10-0-pre-release-updates/#comment-85318):

“Automatically creates an user account from a guest order.

When a user register, check if they have any existing guest orders with the user email. If yes, link all the previous orders to the user.

Button to manually create an user account from order details. From admin panel.

There is a plugin, but this feature should be part of core functionality

https://wordpress.org/plugins/create-user-from-guest-order/”