"AAGUIDs are unique identifiers assigned to FIDO authenticators (including passkeys and security keys) and are used to identify authenticator models for attestation and metadata purposes."

If there is any unique id that can track you, then it's a trap. No security system should be leaking unique ids that can be used to track users.

AAGUIDs are not unique to authenticators. Hundreds of millions of people using the same product have the same AAGUID.