Using HyperFIDO with iOS Devices
If you have a USB Type-A to Lightning adapter, HyperFIDO security keys can be used to sign in to your Google Accounts on iOS devices such as an iPhone or iPad. Simply connect your security key's USB interface to the adapter, then plug the adapter into your iOS device.
NOTE: You must register your security key on iMac or MacBook first. You cannot register a security key with your Google Account on a mobile device.