Navigation-Compose does NOT support Parcelables: https://issuetracker.google.com/issues/182194894

Also see https://twitter.com/ianhlake/status/1369780113970110468

They kept with the "limitation" of restoring navigation state across process death because it is not an "Activity/Fragment limitation of the old UI framework", it's an OS-level expectation for application behavioral correctness. Also see `rememberSaveable`.