Nowadays Dolphin should compile for ARM editions of Windows out of the box, we just don't provide pre-compiled builds on the website at the moment. In other words, follow the Windows build instructions on your Windows ARM device and it should work without further changes (don't forget to select Release / ARM64 target on Visual Studio before hitting the compile button).
Edit: to clarify, pre-compiled Windows builds from the website will work on Windows ARM devices but they're not universal binaries (they're x86_64 only) and will run via Windows' built-in x86 => ARM emulation layer. If you want a native ARM binary, at the moment you must compile Dolphin from the source code...
Edit: to clarify, pre-compiled Windows builds from the website will work on Windows ARM devices but they're not universal binaries (they're x86_64 only) and will run via Windows' built-in x86 => ARM emulation layer. If you want a native ARM binary, at the moment you must compile Dolphin from the source code...
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)