Microsoft’s new Chromium-based Edge web browser is rolling out automatically via Windows Update to customers using Windows 10 1803 or later. The new version of Microsoft Edge will be delivered as KB4559309 to all users and it will replace the legacy Edge browser on all Windows 10 2004, Windows 10 1909 and Windows 10 1903. Users can also download the new Edge from microsoft.com/edge for Windows 10, Windows 8.1, Windows 7, and MacOS for MacOS.
Source: https://www.bleepingcomputer.com/news/microsoft/new-microsoft-edge-rolling-out-to-windows-10-via-windows-update/