As of this writing, Windows 10 on ARM is an ARM64 platform, which only supports 32-bit x86 apps via a built-in emulator. It is not possible to run traditional 64-bit apps in this OS. Earlier, we mentioned that this will eventually be changed. It looks the change goes live.
20236 has beginnings of x64-on-ARM emulation; looks like this feature is landing on-time. (Microsoft announced this would land in November.) Could even show up in the next Windows Insider dev build.
— Rafael Rivera (@WithinRafael) October 15, 2020
We are excited about the momentum we are seeing from app partners embracing Windows 10 on ARM, taking advantage of the power and performance benefits of Qualcomm Snapdragon processors. We heard your feedback and are making Microsoft Edge faster while using less battery, and announced that we will soon release a native Microsoft Teams client optimized for Windows 10 on ARM. We will also expand support for running x64 apps, with x64 emulation starting to roll out to the Windows Insider Program in November.
So, we soon will able to test how the x64 binary layer works on ARM64. It should be a matter of a few Insider releases.