Earlier this year, Microsoft published new Chromium-based version of Microsoft Edge and the browser is being slowly pushed to consumers via Windows Update.
Starting October 29, a new update KB4584642 in WSUS and it will allow you to instantly install the Chromium Edge. Note that the browser is not being forced to businesses.
This update is available for version 1809, 1903, 1909, and 2004. If you’re on 1803, Microsoft says you will receive KB4584641.