chrome ux report provides you data such "cumulative_layout_shift", "first_contentful_paint", "first_input_delay", "interaction_to_next_paint", "largest_contentful_paint", "experimental_time_to_first_byte"
Navigate to the project directory and perform the following commands
npm install
npm start
Make sure to add http://localhost:5000 when running locally at src/services/ChromeUXReportService.js at API_URL