However, it's important to note that our FIDO2 type C to Lightning adapter is designed to support FIDO protocols only, and not OTP. If you need to use OTP functionality with your key, you will need to use NFC instead. Additionally, if you are using your FIDO2 key's HOTP functionality, please be aware that it uses keyboard emulation, which may interfere with the process of entering your PIN code on iOS devices. As the device recognizes the security key as a keyboard, it may disable the on-screen keyboard, making it impossible to enter your PIN code. To avoid this issue, we recommend that you either disable the OTP functionality of your security key using our Windows companion app, or unplug the key when entering your PIN code.

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Additionally, there is another aspect that appears to be more of an iOS GUI glitch. When an iPhone prompts the user to choose the passkey type, users should start using the FIDO2 key without following the on-screen instructions.



Specifically, when selecting the "Security Key / External Security Key" option, iPhones only search for NFC keys and disregard the USB-connected ones.