Внутрь хед ставим
<script src="https://www.google.com/recaptcha/enterprise.js?render=6LfM-tUqAAAAAAK871StVSv4ssTIyIeOk7I7&hl=ru&badge=bottomleft"></script>
и
<script>
        function onClick(e) {
        e.preventDefault();
        grecaptcha.enterprise.ready(async () => {
            const token = await grecaptcha.enterprise.execute('6LfM-tUqAAAAAAK871StVSv4ssTsjweIyIeOk7I7', {action: 'SUBMIT'});
            // IMPORTANT: The 'token' that results from execute is an encrypted response sent by
            // reCAPTCHA to the end user's browser.
            // This token must be validated by creating an assessment.
            // See https://cloud.google.com/recaptcha/docs/create-assessment
        });
        }
    </script>
После отправки формы в консоли Нетворк перейти по ссылке сгенерированного хеша