For hardware where 64-bit architecture isn't suitable, the 32-bit (x86) version offers lower resource overhead: : 1 GHz or faster CPU or System on a Chip (SoC).
Modern Office versions require 64-bit Windows or at least SSE4.2 instruction sets. On an old Atom, you will be limited to Office 2010, LibreOffice, or online web apps. windows 10 enterprise ltsc 21h2 32 bits