Unfortunately, while you can already download the Edge Chromium Release Candidate (RC) on Windows and macOS right now, there’s no word when a pre-release version of the software will be available on the open-source platform.
It’s worth noting that while the Windows and macOS versions have seen quite a few canary/ beta releases up until now, this was the first time we heard about a Linux version being in the works, which is certainly good news for all you Mint, Ubuntu and DSL users.