https://www.bleepingcomputer.com/news/microsoft/the-new-microsoft-edge-is-now-mandatory-in-windows-10-20h2/

Today's release of Windows 10 20H2 is the first release to automatically replace Microsoft Edge Legacy with the new Chromium-based Microsoft Edge regardless of any policies you have in place.

In January 2020, Microsoft officially released its new Chromium-based Edge browser. Since then, those who wished to use it could download it from the Microsoft Edge site or wait for Windows Update to automatically install it.