I've got a weird issue where Passkey fails, but only on developer.apple.com.
Here's how it manifests:
On portal, select "Sign In With Passkey"
Get prompted with TouchId (on my MacBook)
Portal says "can't verify your account"
However:
Sign in with Password works fine
Sign in with Passkey on any other website works fine
Not sure if it's related, but this appears to have happened around the time I had my logic board replaced. I did have weird issues with my iCloud account where I had to sign out of all devices, then sign back in. I assume this has to do with the hardware having the same serial number, but somehow appeared like a different computer in other ways.
Things I've tried:
In Passwords app, searching for "apple.com", I only see passwords, no passkeys. However, Safari password auto-fill always suggests the passkey entry first.
developer.apple.com does not appear to have any way of managing sign-in credentials
accounts.apple.com does not appear to be any way to manage passkeys.
Sign in with Passkey on iPhone also results in "can't verify your account".
Called AppleCare support, they were unable to help. Since Passkeys work for other websites, they believe this is a problem specifically with developer.apple.com. They suggested calling Developer support.
Called Developer support, they were unable to help. They said AppleCare Support is best suited.
Filled out Feedback (FB18185623)
System:
macOS 15.6
Safari 18.6
Has anyone else encountered anything weird like this? Is there any way to fix this? It would be nice if I could just delete the old passkey and create a new one. But I can't find any tool that will let me do that.