debug_manager.xml

<?xml version="1.0" encoding="utf-8" ?>
<templates xml:space="preserve">
    <!-- Add an "Xbus messages" link for single records
        ("Get metadata" only gets shown for single records).
        Base view ref: addons/web/static/src/xml/debug.xml. -->

    <t t-extend="WebClient.DebugManager.View">
        <t t-jquery="a[data-action='get_metadata']:parent" t-operation="after">
            <a
                role="menuitem"
                href="#"
                data-action="open_xbus_messages"
                class="dropdown-item"
            >
                Xbus Messages
            </a>
        </t>
    </t>
</templates>