Sign-In with Apple is a (mostly) standard OpenID Connect provider that works
everywhere (and works just like sign in with FB, Google, et al from a technical implementation), including the Web and Android. It's an interesting miscommunication or misunderstanding (and I was not surprised to see it in this article) that applications and developers think the "Sign in with Apple" button should only show up on Apple devices. It should show up on the web and in Android apps, Apple only
requires it on Apple devices because that's the only devices that they control.
I wish Apple communicated that better and/or developers better understood that Sign in with Apple really is a FB/Google/social login button like all of the others and should be supported everywhere, not just Apple devices.
(I'm in the iOS/Windows dual mode user team myself these days and find that I trust Sign-In with Apple, but I've definitely had to already email developers to request that they add the Sign-In with Apple button to websites and explain why they would/should.)
