Hi Falcão!
Have you checked the documentation? See it here
From it you can see that there is an optional input of the dropdown "Selected Options"
You need to give it the data in order for it to show the data when you load the page.
I would say that this should work:

Notice that I added the Status entity to your GetCustomerDetails query, I did this so that you can display the status label.
Hope this helps.