"Order as a guest" → when guest order is activated in "Shop parameters" → "Order settings".
"New customer" → when guest order is not activated.
An improvement has been made: When guest order is activated, we now have a checkbox to show/hide the password field, allowing users to choose whether to create an account or not.
Hi, I propose this fix to address the issue : https://github.com/PrestaShop/hummingbird/issues/590