The most important aspects when transitioning from React Native to Flutter

Before starting a project, I always want to figure out the best ways to organize the project - the most important concepts are: How to structure modules/components, ... , and which suitable patterns should be use in

In React Native, the project structure, with Redux pattern, be often formed as:

 - /src
    - types
    - constants
    - components
        - collection
        - todolist
        - settings
        - etc ...
    - utils
    - reducers
    - store.ts
    - middleware.ts
    - rootReducer.ts

But when transitioning from React Native to Flutter, the concepts of project structure/pattern is so different.

It seem that all our source files should be located under /lib .

So, currently I've been facing with project structure to organize my modules/components/ ..., and the best UI pattern should be used in.

Could you please give me some ideas as detailed as possible?