Build it on nostr:npub1dllf8wmj6jk83r7chck6madmfgh3fges65ctpe5t6ueujazvvcvsh20tz5 ! Bisq 2 allows user-defined payment methods. You could do a trade today! sats for nuts.
Also Bisq2 modular design allows for multiple trade protocols. You could add one for cashu.