Volume License installations of Office 2016, 2019, and 2022 can be updated by WSUS but I believe only with MECM/SCCM, not with WSUS alone (I can't 100% remember if MECM/SCCM is a requirement, but on generating a new config on config.office.com, it only lists MECM for updates).
Office Content Delivery Network (CDN)
Local source
Microsoft Endpoint Configuration Manager