[joshmanders]

I delete Facebook a few times and every time I installed the app the first screen I got prompted with was "Hello Josh, would you like to sign in with your stored details?" Not all data is scrubbed. This persisted to even today running on iOS 17 Public Beta.

[Two4]

Did you also delete Messenger, Instagram, Whatsapp and Threads?

[joshmanders]

Yes.

[TheNewsIsHere]

I have experienced the same thing. Even when Apple made changes in Keychain policy to try to combat fingerprinting, “I never got the memo.” That sounds nuts, but I’m in the same boat.

I’ve had a few apps I’ve redownloaded months later, the only one from the developer, and my auth state was preserved.

I keep hearing that the Keychain data should be deleted, but my iCloud Keychain is filled with long-dead data

[can16358p]

It's most probably keychain.

[bobbylarrybobby]

Probably keychain, but maybe just iCloud?