1) Not sure why navigating is "more complex on native". The platform the code runs on has nothing to do with the way the user interacts with the page. Complex navigation state is represented as one or many stacks of URIs.

2) In React Router you can have a statically available route config. This is React. Make an array then map it to render.

3) React Router is all components, so it composes exactly like the rest of your app. No new API to learn. It's Just React™