Ok, so checkbox values are now displaying correctly on invoices and on the order page, but the value is just “0” or “1”. This does not always make sense to a human – it would be nice to be able to provide override strings. eg. For “Participate in Customer Survey?” the value “Yes” or “No” would show up on order details.

Hope this makes sense.

https://wordpress.org/plugins/woocommerce-checkout-manager/