Shows the Baseline status of each web feature and how its support and test results have changed over time.

Web Platform Status (webstatus.dev) is a Google Chrome dashboard that tracks web platform features across browsers. It combines data from web-features (Baseline status), MDN's browser-compat-data and web-platform-tests.
You search features with a query syntax and see their Baseline status and test results per browser. web.dev says it also offers Baseline alerts, and its data is available through an API for building your own tools.
The code is open source on GitHub under Apache-2.0.
Baseline