Passkeys are built on the FIDO2 standard (CTAP2 + WebAuthn standards). They remove the shared secret, stop phishing at the source, and make credential-stuffing useless.
But adoption is still low, and interoperability between Apple, Google, and Microsoft isn’t seamless.
I broke down how passkeys work, their strengths, and what’s still missing
Not sure if that’s actually a “passkey” in the same sense then, MS is doing its own shit for sure. I use vaultwarden/bitwarden and can save standard passkeys there no problem.