Hello @Jefferson Dourado, how are you doing today? 

You are able to update a due date field with the fixed card value using automation but it is not possible, at the moment, to update the top buttons without using fields. 

To explain a little more, if you have a field you can update it with a dynamic value and update it with general attributes:
 

However, If you don’t have a field the automation doesn’t work for the top buttons. It is a great suggestion, though, and I recommend you sending it as a #productfeedback   

If you have any other questions I am here to help!