Is it mandatory to implement all levels of Clean Architecture when creating an application?

Implementing all levels of Clean Architecture is not mandatory when creating an application, especially if the project is small or the requirements are simple. Clean Architecture is a set of guidelines and principles that help organize code to be modular, testable, and easily maintainable.

Depending on the scale and goals of the project, only certain levels may be applied or the architecture can be adapted to specific tasks. The main thing is to adhere to separation of concerns and minimize dependencies between layers.

For example, in a small application, it may be sufficient to separate data and presentation layers, while more complex projects can use all levels (Entities, Use Cases, Interface Adapters, Frameworks & Drivers) for better scalability and support.