The /MediaArch x64 argument specifies that MCT downloads a 64-bit Windows 10 Enterprise edition – and in this case, v1909. If you need a 32-bit Windows version, change it to /MediaArch x86.
a 32-bit Windows 8.1 machine will be upgraded to a 32-bit Windows 10 operating system. See Windows 10 and Windows 10 updates. The Pro version adds data protection via encryption, remote desktop ...
This application allows you to download the Home or Pro versions of Windows 10, and you can pick from the 32-bit or 64-bit version for both. Following your selections, you can install directly to ...