Can I use an iPhone connected via USB to a computer as a FIDO2 security key (for example in OpenSSH)? [migrated]

In the same way that I can use a Yubikey or any other FIDO2 hardware key to store resident keys for use with OpenSSH (for example ssh-keygen -t ed25519-sk -O resident -O verify-required) I would like to use my iPhone. I have my iPhone most… Continue reading Can I use an iPhone connected via USB to a computer as a FIDO2 security key (for example in OpenSSH)? [migrated]