“Name” Field Not Transferring to MailChimp List

Hi, as mentioned in a previous post I’ve used the functions.php code that you guys provided to add a “name” field to the top bar. However, when the name is inputted, it does not transfer to the mailchimp list. Is there a fix for this?

add_action( ‘mctb_before_submit_button’, function() {
echo ‘<input type=”text” name=”NAME” placeholder=”Your name” />’;
});

add_filter( ‘mctb_data’, function( $vars ) {
$vars[‘NAME’] = ( isset( $_POST[‘NAME’] ) ) ? sanitize_text_field( $_POST[‘NAME’] ) : ”;
return $vars;
});