Sounds like a very Open-Source approach. Ignore the documentation, ignore the tutorials, grab the Repo of a working project close to what you want and read the code, until you can modify it.
Are you talking about Flow/Mortar? Those were pretty much abandoned and were, imo, overly complex.
That said, the Android UI flow was pretty bad before. Hopefully Compose makes it better.
IIRC Square had a technical manager (maybe CTO level?) who came from Android at Google, which may have helped. Square also open sourced early iOS tools like PonyDebugger which were ahead of the game when they came out. When they hired Jake Wharton they got a stellar champion of open source software creation whose focus was Android.