You can find examples demonstrating features of pywebview in the sidebar.
Below there are a couple of non-trivial examples that demonstrate an application architecture.
React boilerplate. A complete React-based boilerplate with installation, usage and building taken care of out of the box.
A simple todo application that uses serverless architecture. Communication between frontend and backend is provided by built-in API.
HTTP server application
In this example communication between frontend and backend is facilitated by a Flask server.