USB C to Lightning Adapter? For Yubikey 5C or 5C NFC : r/yubikey
Amazon.com: Yubico - YubiKey 5C Nano - Two Factor Authentication USB Security Key, Fits USB-C Ports - Protect Your Online Accounts with More Than a Password, FIDO Certified USB Password Key, Extra
iPhone set to match Android security with new Yubico hardware key - CNET
Yubico releases the first Lightning security key for iPhones - The Verge
Yubico's 'Clear Edition' YubiKey 5Ci Lightning/USB-C security key now available for $70 - AndroidRookies
Amazon.com: Yubico YubiKey 5C - Two Factor Authentication USB Security Key, Fits USB-C Ports - Protect Your Online Accounts with More Than a Password, FIDO Certified USB Password Key : Electronics