~  ssh-keygen -vvv -t ed25519-sk
Generating public/private ed25519-sk key pair.
You may need to touch your authenticator to authorize key generation.
debug3: start_helper: started pid=276088
debug3: ssh_msg_send: type 5
debug3: ssh_msg_recv entering
debug1: start_helper: starting /usr/lib/ssh/ssh-sk-helper
debug1: sshsk_enroll: provider "internal", device "(null)", application "ssh:", userid "(null)", flags 0x01, challenge len 0
debug1: sshsk_enroll: using random challenge
debug1: sk_probe: 1 device(s) detected
debug1: sk_probe: selecting sk by touch
debug1: ssh_sk_enroll: using device /dev/hidraw5
debug1: ssh_sk_enroll: fido_dev_make_cred: FIDO_ERR_INVALID_ARGUMENT
debug1: sshsk_enroll: provider "internal" failure -1
debug1: ssh-sk-helper: Enrollment failed: invalid format
debug1: main: reply len 8
debug3: ssh_msg_send: type 5
debug1: client_converse: helper returned error -4
debug3: reap_helper: pid=276088
Key enrollment failed: invalid format