For Windows, it seems it's possible[0, see footnote], however there are problems like general incompatibilities [1], and official support status is " We have this in our backlog. At this point it's not prioritized.".
0.footnote: "Windows Hello also supports other types of authenticators like internal TPM device(if they support generating ECDSA or Ed25519 keys, they can be used instead of FIDO/U2F security keys)."
0: https://github.com/tavrez/openssh-sk-winhello
0.footnote: "Windows Hello also supports other types of authenticators like internal TPM device(if they support generating ECDSA or Ed25519 keys, they can be used instead of FIDO/U2F security keys)."
1: https://github.com/tavrez/openssh-sk-winhello/issues
2: https://github.com/PowerShell/Win32-OpenSSH/issues/1804#issu...