Hello,

Unfortunately, there is no such feature at the moment. We will consider adding such options in the future. For now, this issue can be fixed by adding the following code snippet to the Custom CSS area in Theme Settings.

body .added_to_cart, 
body .btn, 
body .button, 
body [type=submit], 
body [type=button], 
body button {
  text-transform: none;
}

Kind Regards
XTemos Studio