Dear Maintainer,

I tried to create a ssh key pair with the command
ssh-keygen -t ed25519-sk

I got the following output:
Generating public/private ed25519-sk key pair.
You may need to touch your authenticator to authorize key generation.
Key enrollment failed: invalid format

No key was created.

So I tried again, this time with
ssh-keygen -t ecdsa-sk

I got the following output:
Generating public/private ecdsa-sk key pair.
You may need to touch your authenticator to authorize key generation.
Enter file in which to save the key (/home/iw/.ssh/id_ecdsa_sk):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/iw/.ssh/id_ecdsa_sk
Your public key has been saved in /home/iw/.ssh/id_ecdsa_sk.pub

As you can see, a key was created.

I tried the same on another machine running Debian. And on a machine
runnig Ubuntu 20.04. They showed the same behavior.

Regards,

Ingo