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
Personally, I found that It works well with Microsoft, Paypal, Google, Shopify and Proton. I was really surprised to find the option on German government sites, worked there as well. Tested in Ungoogled Chromium and Librewolf. The only thing I find dissappointing is adoption