I am experiencing the same issue, as well as others I know - under 18 SSC22 applicant. Hope to see you there! :)

[quote='767318022, bobshand, /thread/698683?answerId=767318022#767318022, /profile/bobshand'] The long and short of it; is that it looks like SSH now supports this, but you have to provide your own SSH_SK_PROVIDER by compiling libfido2 [/quote] A little late to the party, but as of January 2025, the need to manually compile the libfido2 Security Key Provider still persists. I created a guide along with a little shell script that compiles it from OpenSSH Portable and sets it as the SSH_SK_PROVIDER. This way, you don't need to install another SSH client. I tested it on Apple Silicon and Intel machines both running macOS Sequoia 15.2. After executing the script, you should be able to generate ED25519-SK keys normally using ssh-keygen. I hope it is helpful to anyone who might need it! Link to the GitHub Gist With the Script