select list at checkout

It’s possible to add list choice to WooCommerce checkout integration via some custom code, here is an example snippet: https://github.com/ibericode/mailchimp-for-wordpress/blob/master/sample-code-snippets/integrations/woocommerce/list-choice.php


?How to add code to your site:?https://www.mc4wp.com/kb/adding-code-to-wordpress-site/

For the registration form I don’t have a clear cut piece of example code, but it would be very similar to the WooCommerce example, maybe if you are a coder yourself you can mix that example with this example to make it work: https://github.com/ibericode/mailchimp-for-wordpress/blob/master/sample-code-snippets/integrations/wp-registration-form/custom-registration-fields.php

Hope that helps. If you have any questions, please let me know!