Apart from Google, which websites work with 1Password passkeys?

Mirv

Adding a passkey adds a stronger way of signing in, rather than a weaker one, so signing in to your accounts is no less secure than it was.

Some websites will let you use a passkey exclusively (with no password), whereas some, such as Google, still need you to have a password as a fallback. As always, a strong random password should be used in cases where you still need to have one.

As the adoption of passkeys grows, you'll probably start to see them being offered first, before passwords, when you sign up to new websites. Or, you might get a notification when you sign in to an existing website with a password that you can use a passkey instead. It'll be up to whoever runs the website to make that decision, just like it is now about whether or not to offer two-factor authentication, but we'd definitely like to see a speedy rollout! :)