To download the Windows 10 ARM ISO, you'll need to use the Windows 10 Media Creation Tool or obtain it from a trusted source.

Windows 10 reached its official lifecycle. Consequently, Microsoft has shifted public deployment media availability to focus entirely on Windows 11 ARM64 ISOs . However, if you require a Windows 10 ARM ISO for legacy testing, app compatibility evaluation, or running virtual machines (VMs) on Apple Silicon, you can still acquire or build a functional image using alternative methods. The Official Status: What to Expect from Microsoft