Digging around in iOS settings under Apple Account, I encountered the Sign In with Apple page listing apps to which authentication is being provided via my Apple account . All app entries are familiar to me except for one with an Apple logo and "Sign In Group Production" as the app identifier.

I found a discussion on Apple's developer forum about Sign In With Apple and app grouping (https://developer.apple.com/forums/thread/125087 ), but this isn't mentioned, and I don't use developer features or TestFlight on this device.

Does anyone else have this entry or know what it's used for?