Hi there!
You. can follow the guide here to add that customer fields on the checkout page to the new order email – https://docs.woocommerce.com/document/add-a-custom-field-in-an-order-to-the-emails/
If you need help with that,we highly recommend contacting one of the services on our Customizations page (https://woocommerce.com/customizations/)
I do not understand how to modify the code to enter the data in the mail …
The field I have already generated, but I cannot modify the email to add that generated data
The code in the documentation I provided is just an example and you can add it to your theme’s function.php file or use a plugin like this to add the snippet – https://ww.wp.xz.cn/plugins/code-snippets/
If you need help in modifying the code to meet your needs, we highly recommend contacting one of the services on our Customizations page
We haven’t heard back from you in a while, so I’m going to mark this as resolved – if you have any further questions, you can start a new thread.