There appears to be a short list of banks that bisq says it requires when adding a Zelle account. Will an account created at ZellepPay.com not work for bisq if not thru one of those banks?
Bisq doesn’t really handle the payment method side of the trade, only the BTC. If the other users receives the payment properly and marks it as confirmed, Bisq will see no difference.
You are doing this at your own risk however, since some banks advertise that they use Zelle even when that is not really the case.