sometimes when i add an info plist from info in project to project navigator. sometimes it dissapears from project navigator.how can i bring it back to show the info.plist on the priject navigator? I want to keep it there

i want to save data like images, text,amd mapviews with swiftui. It is only saved but if you delete the app of buy a new iPhone everything is deleted, how can I make if that the information saved on my app is saved even after I update the app, delete the app, or put the app in another iPhone with SwiftUI? i have watched youtube videos and im still confused,please help.