The latest release dates back from 2012, and is part of .NET Framework 4.5.
Windows Workflow Foundation | Microsoft Docs[
^] presents the WF framework and is dated between 2017 and 2018, for most of its parts.
MS decided not to port it to .NET Core, at the moment.
There also exist a few open-source alternatives, like wexflow for example. You can search for them with the keywords "workflow framework" in your favourite search engine.