I have followed the below link to add captcha in custom form

https://magento.stackexchange.com/questions/133238/magento-2-how-to-add-captcha-to-a-custom-form

Here is my config.xml of [Vendor]/[Module]/etc
    
      <default>
        <customer>
            <captcha>
                <shown_to_logged_in_user>
                    <captcha_form>1</captcha_form>
                </shown_to_logged_in_user>
                <always_for>
                    <captcha_form>1</captcha_form>
                </always_for>
            </captcha>
        </customer>
        <captcha translate="label">
            <frontend>
                <areas>
                    <captcha_form>
                        <label>Captcha Form</label>
                    </captcha_form>
                </areas>
            </frontend>
        </captcha>
    </default>
</config>

  This is the code in layout file 

 app/design/frontend/[Vendor]/[Theme]/Magento_Customer/layout/customer_account_renew.xml

     <referenceContainer name="content">
        <block class="Vendor\Module\Block\Customer\Renewal" name="customer_form_renewal" template="Magento_Customer::form/renewal.phtml" cacheable="false">
				<container name="form.additional.info" label="Form Additional Info">
                    <block class="Magento\Captcha\Block\Captcha" name="captcha" after="-" cacheable="false">
                        <action method="setFormId">
                            <argument name="formId" xsi:type="string">custom_form</argument>
                        </action>
                        <action method="setImgWidth">
                            <argument name="width" xsi:type="string">230</argument>
                        </action>
                        <action method="setImgHeight">
                            <argument name="width" xsi:type="string">50</argument>
                        </action>
                    </block>
                </container>
        </block>		
    </referenceContainer>
		<referenceBlock name="head.components">
            <block class="Magento\Framework\View\Element\Js\Components" name="captcha_page_head_components" template="Magento_Captcha::js/components.phtml"/>
        </referenceBlock>

I have used below code in my renewal.phtml like below

      <?php echo $block->getChildHtml('form.additional.info'); ?>

It is showing in admin panel in customer configuration and i have enabled the setting, but i can't see the captcha inside my custom page.

What is the error please someone suggest me.