About Microsoft Office 2016/2019/2021 32-bit Here

The 32-bit versions of these suites are designed primarily for compatibility rather than raw performance.

You have custom-built internal applications (VBA/COM) that are strictly 32-bit dependent. ABOUT Microsoft Office 2016/2019/2021 32-bit

Microsoft currently recommends the 64-bit version for almost all users to leverage better processing power and security features (like Hardware-enforced Stack Protection). You should only opt for the if: The 32-bit versions of these suites are designed