Yes, we support M2FA (Multiple 2-Factor Authentication) for passkeys. Upon login to IBKR, you will be able to select which 2FA method to use from a drop-down menu. You can continue using your existing 2FA methods (IBKey, Mobile Authenticator, Digital Security Card+, SMS) alongside passkeys.
Important Note: The above does not apply to the IB-JP entity. Due to regional regulations, Passkey is the only 2FA method allowed for Japanese clients.