What do you think about this claim from Apple? Sign In With Apple Helps Keep You Secure Online. Here’s How to Use It
You can use Sign in with Apple for an easy and secure way to sign into your apps and online accounts.
But then they could be tracking all your information right??
Yes, to an extent, unless you use the same email address for creating accounts and your apple ID. I like to configure accounts using my secondary email address rather than letting Apple or Google login for me.