<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
    <system>
        <tab id="botamp" translate="label" sortOrder="10">
            <label>Botamp</label>
        </tab>
        <section id="settings" translate="label" sortOrder="130" showInDefault="1" showInWebsite="1" showInStore="1">
            <label>Botamp Application Settings</label>
            <tab>botamp</tab>
            <resource>Botamp_Botamp::config</resource>
            <group id="general" translate="label comment" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
                <label>General</label>
                <comment>Visit your bot settings page on Botamp to get your API key.</comment>
                <field id="api_key" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="0" showInStore="0">
                  <label>API key</label>
                </field>
            </group>
        </section>
    </system>
</config>

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
    <system>
        <tab id="botamp" translate="label" sortOrder="10">
            <label>Botamp</label>
        </tab>
        <section id="settings" translate="label" sortOrder="130" showInDefault="1" showInWebsite="1" showInStore="1">
            <label>Botamp Application Settings</label>
            <tab>botamp</tab>
            <resource>Botamp_Botamp::config</resource>
            <group id="general" translate="label comment" type="text" sortOrder="10" showInDefault="1" showInWebsite="0" showInStore="0">
                <label>General</label>
                <comment>Visit your bot settings page on Botamp to get your API key.</comment>
                <field id="api_key" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="0" showInStore="0">
                  <label>API key</label>
                </field>
                <field id="order_notifications" translate="label" type="select" sortOrder="1" showInDefault="1" showInWebsite="0" showInStore="0">
                  <label>Enable order notifications</label>
                  <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                </field>
            </group>
        </section>
    </system>
</config>

Add field to enable/disable order notifications
Add field to enable/disable order notifications
