I have done all of the refactoring to migrate from SceneDelegate to using a SwiftUI App and Scene with WindowGroup. I noticed that when the app is updated from the previous version, the app launches to a black screen, and you can't do anything with it. No matter how many times you quit and relaunch the app, nothing is navigable. I can log something in the init function of the App struct, but not in the onAppear modifier.
Uninstalling the app and installing it fresh works fine, but I don't want users to have to do this (I verified that this issue also happens when updating from my released app to a TestFlight beta).