This multi-version release supports both and x64 (64-bit) architectures.
This particular build (10730.20102) belongs to the , which is the primary perpetual release channel for Office 2019. Microsoft Update Catalog This multi-version release supports both and x64 (64-bit)
Comprehensive Guide to Microsoft Office 2019 Professional Plus (Version 1808 Build 10730.20102) This multi-version release supports both and x64 (64-bit)