Add the flutter rename package to pubspec.yaml file.
flutter pub global activate rename
flutter pub global run rename --bundleId com.onatcipli.networkUpp
flutter pub global run rename --appname "Network Upp"
Navigate in your flutter project to android > app > src > main > kotlin > com > example > {appName} > MainActivity.kt
Then change the package name from com.example.todo_app to com.onatcipli.networkUpp.
Navigate to the AndroidManifest.xml files in your debug, main and profile folders respectively and change package name of each to new package name.