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Google will now make passkeys the default for personal accounts
(arstechnica.com)
This is a most excellent place for technology news and articles.
I just replaced my iPhone, and the few places I “sign in with Apple” still work in the new phone. Yes, you can back it up and restore to a different device. I assume you can also use it across devices but I haven’t tried that
This is something different to PassKeys. "Sign in with Apple" is Apple telling online service "let him in", while PassKeys is storing your authentication data on your device.