I understand that your requirement is to auto select the payment type(say differentiated) based on the role(i.e. borrower) while filling the form. Again, when user navigates to next page, this selection must be displayed. Is my understanding correct?
If yes, I have created a sample case that fills the forms and then displays the selected field including the default radio button value.
Here, the paymentType field is auto-populated based on role field.
When user navigates to the next UI screen, the fields are displayed appropriately.
FillForm section's configuration as below:
In the Data Transform SetPayType, set the PaymentType based on the role.