Sample code using simple-stack to display "First-Time User Experience", based on the "Conditional Navigation" section of Jetpack Navigation documentation.
Please beware that the original FTUE approach outlined in the documentation of Jetpack Navigation has various anti-patterns.
None of those anti-patterns are relevant in this sample (unlike in the Jetpack Navigation FTUE sample), as simple-stack doesn't try to guide you to your doom.
For example, Simple-Stack already allows navigating inside "ViewModels" directly. And you would never create "ViewModels" as global services.
The sample also features an Espresso test. People like Espresso tests, so I added one.