SwiftUI 2.0 brought us a lot of new features. My favorite is the new application lifecycle because it is simpler than the old one, but configuring it with Firebase can be tricky.
Since iOS 14, you can now implement Sign In With Apple natively using SwiftUI.
Most iOS applications will probably require some form of authentication, and using Firebase is probably the easiest way to acheive this. This article will explain how you can add basic authentication to an app built with SwiftUI.