Microsoft has released out of band updates for 2012 r2, 2016 and 2019 details further below.
Windows Server 2012 R2: KB5014986and Update Catalog
Windows Server 2019: KB5015018 and Update Catalog download.
Windows Server 2016: KB5015019 and Update Catalog download.
When will out of band updates for 2012 r2, 2016 and 2019 operating systems are published in patch manager.
Release : 14.5 CU3
Component : Client Automation
Content team is working on these out of band updates to include in 2206 rollup if they are not superseeded in next month released patches from microsoft.