[dinodino]

A correction to your statement: the Unreal Engine *does* work on ARM processors...they have an ARM build.

[Starcitizen]

Let’s see. I’m in Unreal 4.25 right now.
Build targets:

Android
Desktop (win+mac+linux)
HoloLens
iOS
Linux (AArch64)
Lumin
Mac
TvOS
Windows (32-bit)
Windows (64-bit)

No native Windows RT support or Apple M1 support