Microsoft's Edge Beta is now available for ARM64 devices

Microsoft Edge Beta is now available for ARM64 devices. Microsoft's Edge browser, which is now officially available as a Chromium-based browser instead of the old UWP version that ships with Windows 10.

Microsoft Edge (Beta):

Microsoft Edge Browser, which is finally available for ARM 64 devices, officially available in the Beta Channel that ships with Windows 10.
As stated by Microsoft,

Microsoft Edge is now running natively for the ARM64 architecture, which is used in some Windows 10 devices like the new Surface Pro X. The ARM version of Microsoft Edge will automatically replace the previous configuration, in which the 32-bit version was running in an emulator.

Following the full official release of the new Microsoft Edge browser for all Windows and macOS devices, the ARM64 variant has now finished up to a beta version, about a month after it debuted in the Dev channel, ARM64 support is now live in the Beta channel of the Insider program, too. The ARM64 builds will substitute the x86 versions of the browser on devices for both the Windows and macOS where they're supported.
Also, Microsoft itself pointing out on a known issue with the ARM builds in an official release of Microsoft Edge Beta that,

Video Playback may not work properly on some Websites.

The new ARM64 (64-bit) version of the Microsoft Edge browser runs especially well on the Surface Pro X which is Optimized for a better speed by running natively and bringing all the latest syncing features to make it the best browser by far for PCs running Qualcomm Snapdragon processors you can download the Beta channel from here.