Users who have devices with an ARM SoC and Windows 10 installed are waiting for a newer native ARM browser than the classic x86 Edge bundled with the OS. It looks like the wait is over. Microsoft Edge Chromium for ARM64 made its first appearance on Microsoft's servers.
At the moment of this writing, Microsoft didn't officially announce Edge Chromium for ARM64. It is released by a Twitter user. Use it at your own risk.
The build appears to be genuine, properly signed by Microsoft's digital signature. It doesn't include the updater app, so it won't receive further updates. Probably, Microsoft is still working on an ARM64 compatible native updater for the app.
So, Microsoft has started making Edge builds for ARM64 devices, and we can expect the official release soon.