Show Order Comments from Bold Commerce

If you are using Magento2-OrderComments module for the Order comments and want to display the checkout comments in the Order PDF, then you can either use the following snippets under Stores > Configuration > Sales > PDF Print-outs > Order > CustomText :

{{var order.bold_order_comment}}

OR

{{var order.getBoldOrderComment()}}

Alternatively, this could be achieved with a simple template customisation in your theme. Please copy
vendor/fooman/pdfcustomiser-implementation-m2/src/view/frontend/templates/pdf/order.phtml to your theme) and add the following code at desired location

<?= $order->getBoldOrderComment() ?>