Zelle transfers can’t be canceled according to Zelle’s website:
"You can only cancel a payment if the recipient hasn’t yet enrolled with Zelle . You can go to your activity page within the Zelle experience, either within your mobile banking app or the Zelle app, choose the payment you want to cancel, and then select “Cancel This Payment.”
If your recipient has already enrolled with Zelle , the money is sent directly to your recipient’s bank account and cannot be canceled."
Source:
https://www.zellepay.com/support/can-i-cancel-a-payment
How many fraudulent transfers were made using Zelle and Bisq? Was there any case of banks reversing the transfer?