magento-test/app/code/Magento/Weee/etc/pdf.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Sales:etc/pdf_file.xsd">
    <totals>
        <total name="weee">
            <title translate="true">FPT</title>
            <source_field>weee_amount</source_field>
            <model>Magento\Weee\Model\Sales\Pdf\Weee</model>
            <font_size>7</font_size>
            <display_zero>false</display_zero>
            <sort_order>250</sort_order>
        </total>
    </totals>
</config>