An reviews web scrapper scrapper using Beautiful Soup is already build in my repository:- https://github.com/luv8860/Web-Scrapping-with-flutter-and-Flask/tree/main/web-scrapping-flask-main and this is the UI for that. This Project explains how to connect each other .
App:- https://drive.google.com/file/d/1y5IiMMi-KBhW6Wt00N5udkPLFPDHbH3I/view