That's likely Google's implementation of Local Network Access (https://wicg.github.io/local-network-access/ https://wicg.github.io/local-network-access/). The

That's likely Google's implementation of Local Network Access (https://wicg.github.io/local-network-access/ https://wicg.github.io/local-network-access/). The browser delegates passkey plumbing up to the core platform typically, so it already should have the appropriate permissions.