Microsoft has finally made available the Edge browser for Linux. The build 88.0.673.0 from the Dev channel is now available for download. It is wrapped into a DEB package, so it can easily be installed in Ubuntu, Debian, and their derivatives.
Microsoft is going to start testing a Linux version of Microsoft Edge in October 2020. The browser is expected to become available via the Edge Insider website, and in a repo for popular Linux distros.
During the Build 2020, Microsoft has demoed Microsoft Edge browser running on Linux for the first time. This means that the company hasn't abandoned the open-source platform and is still working to support it in Edge.