If you would like to customize the order items table appears in your email, you will have to create a template override for following files

/wp-content/plugins/woocommerce_email_cuztomizer_with_drag_and_drop_builder/templates/woo_mail/order_items-3.php
/wp-content/plugins/woocommerce_email_cuztomizer_with_drag_and_drop_builder/templates/woo_mail/email-order-items-3.php
/wp-content/plugins/woocommerce_email_cuztomizer_with_drag_and_drop_builder/templates/woo_mail/order_totals-3.php

Copy the above files and paste it under the directory path

/wp-content/themes/YOUR-THEME/woocommerce_email_cuztomizer_with_drag_and_drop_builder/woo_mail/

Then, edit the overridden file and make your changes. Save.

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