Some Apps’ data and passwords don’t get transferred when you change iPhones.
Google Authenticator and Signal are among two that I found needed QR codes to transfer directly between the phones.
What are some Apps you needed to manually transfer?
Has anyone made a list or found a Wiki that would be helpful to people changing phones?
Google Authenticator needs just signing in again to your Google account and it restores everything, if you have logged in to the same account on your old device as well.
Microsoft Authenticator can do sync but i have found it highly unreliable and it cannot transfer if you are moving from an Android device to iPhone. It uses iCloud to backup on iPhones and Google Drive (on Android) without giving an option to export anything. One more bad design by Microsoft, typical.