module-vendor-notes/etc/config.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
    <default>
        <vendor_notes>
            <general>
                <thermo_fisher_note>Example multi-line note for Thermo Fisher.&lt;br&gt;Contact: &lt;a href="mailto:support@thermofisher.com"&gt;support@thermofisher.com&lt;/a&gt;&lt;br&gt;More info: &lt;a href="https://thermofisher.com/support"&gt;Support Page&lt;/a&gt;</thermo_fisher_note>
                <orion_note>Example note for Orion.&lt;br&gt;Email: &lt;a href="mailto:info@orion.com"&gt;info@orion.com&lt;/a&gt;</orion_note>
                <nalgene_note>Example note for Nalgene.&lt;br&gt;Link: &lt;a href="https://nalgene.com/help"&gt;Help Center&lt;/a&gt;</nalgene_note>
                <thermo_fisher_parts_note>Example note for Thermo Fisher Parts.&lt;br&gt;Support: &lt;a href="mailto:parts@thermofisher.com"&gt;parts@thermofisher.com&lt;/a&gt;</thermo_fisher_parts_note>
            </general>
        </vendor_notes>
    </default>
</config>