We are used to detect the currently installed Office version by getting the full version (e.g. from the file info of an installed Office executable) and map the mayor versi
Office 365, Office 2019, and Office 2016 all have the same version: 16.0. You can refer to the following link:
Supported scenarios for installing different versions of Office, Project, and Visio on the same computer
Currently, Microsoft has not released a message to stop updating office2016.
I've only seen from the document that office2019 has only one release, and if you've installed office2019, then your office2019 is the start.
Please See the following link:
Update history for Office 2019