Hi Lakshmi,
In T.C FBZP, go to Paying Methods in Country Code and select Country and Paying Method(Ex: c, or create your own for IBAN) and click on Details.
In there you will find Bank Details (you will find IBAN option).
If you try to reallocate the payment in APP(if there are multiple payments), then you will see as below,
And below is the Output.
Hope this helps YOU!!!
Note: The IBAN in the screen is Invalid and is for Training Purpose Only