If the exchange feature is not integrated yet, maybe consider integrating Bisq or Robosats instead (if technically possible). Or skip it; honestly, anyone setting up a multisig solution like this, doesn't need an exchange embedded in the wallet software.

if you leave out KYC integrations and make sure it can work with other wallets (no vendor lock-in), it can be a very decent and successful device. Open-source hardware would be a giant cherry on top.