Huge day for passkeys!

Starting today, you can set up a passkey for your Google account. At this stage of the industry-wide transition, setting up a passkey doesn’t invalidate your password, so it’s 100% safe to set up. https://blog.google/technology/safety-security/the-beginning-of-the-end-of-the-password/

The beginning of the end of the password

We’ve begun rolling out support for passkeys across Google Accounts on all major platforms as an additional option that people can use to sign in.

Google
@rmondello I’m having trouble understanding how this is supposed to work. I set up a passkey on my iMac, then when I go to login to Google on my iPhone, it doesn’t recognize that there is a passkey saved in my keychain. I saw the same thing when I set up a pass key for eBay.
@mcelhearn @rmondello Google Chrome support is somewhat half-baked at this point. They can not sync with iCloud Keychain yet: https://developers.google.com/identity/passkeys/supported-environments#macos
Passkey support on Android and Chrome  |  Authentication  |  Google for Developers

Google for Developers
@mlinzner @rmondello I set up the passkey in Safari.
@mcelhearn ugh sorry I misread your first post. This sounds like a Mac to iOS Sync issue then? Did you check if the passkeys are visible on your phone under Settings > Passwords? If not it might be worth checking if Settings > iCloud > Passwords&Keychain > Sync to this device is turned on.
@mlinzner Yes, they sync regularly. But I also saw this when I set up a passkey on eBay. I think there’s something wrong with keychain sync for passkeys.
@mcelhearn ok, that's interesting. For what it's worth, I did set up passkeys for a few of my own implementations, for Mastodon (2FA only) and also for Google. They all synced fine between iPhone and Safari on the Mac.