ReCaptcha option

I see this code in plugin
//Disable recaptcha fields if disabled
$('input[name="xoo-el-advanced-options[m-en-recaptcha]"]').on('change',function(){
var fields = $('input[name="xoo-el-advanced-options[m-en-recaptcha-secretkey]"] , input[name="xoo-el-advanced-options[m-en-recaptcha-sitekey]"] ').parents('tr');
if( $(this).is(':checked') ){
fields.show();
}
else{
fields.hide();
}
}).trigger('change');

But I can’t see this options in settings.

We need this functionality to avoid spam submmissions in the plugin forms.