Are forms mobile friendly?

are all forms already mobile friendly or is there something that must be added to make them such?

Our form are by default mobile responsive. In most cases there is nothing that should be done on your end. However if you noticed that some field on your form is not responsive, you can add Mobile Responsive widget to your form. 

How to Add a Widget to your Form?

Hope this will help. Let us know if you need further assistance.