What about register the clients sending them the password and the email is the username?
So then they don’t need everytime to insert the shipping address, but just confirm or change it.
Thanks, but it not register automatically the new clients with an automatic password, they have to do it by another path and not during the first order.
The users must go to website/wp-login.php?action=register instead we could add an optional checkbox only to the first clients, asking if the ywould like to automatically register and automatically wordpress coudl sned to them a password too in email.
doing something similar to https://wordpress.org/plugins/wp-password-generator/