Am a keen follower of Microsoft's SharePoint Blog and proud to provide this direct from the Microsoft Tech Community:
Last year Microsoft shared plans for several new investments in our SharePoint Server ecosystem. One of those investments is our long-term support for the SharePoint 2013 Workflows platform for SharePoint Server. SharePoint 2013 Workflows are a key scenario for SharePoint Server customers as they power many critical business processes and can operate in purely on-premises deployments.
Today, Microsoft is pleased to announce the release of SharePoint Workflow Manager, a new workflow engine to power the SharePoint 2013 Workflows platform for SharePoint Server and replace Service Bus and Microsoft Workflow Manager. SharePoint Workflow Manager is compatible with SharePoint Server 2013, 2016, 2019, and Subscription Edition. We recommend that all SharePoint Server customers using SharePoint 2013 Workflows upgrade to SharePoint Workflow Manager as soon as they’re able to. Microsoft will focus all future investments and maintenance on SharePoint Workflow Manager rather than Microsoft Workflow Manager, including providing support beyond the year 2026.
Microsoft will continue to provide technical support for existing deployments of Service Bus and Microsoft Workflow Manager until the version of SharePoint Server they’re being used with reaches end of support, or until July 14, 2026, whichever comes first. However, the Service Bus and Microsoft Workflow Manager installers are no longer available from the Microsoft Web Platform Installer (WebPI). Customers who need new SharePoint 2013 workflow engine installations can only install SharePoint Workflow Manager.
This announcement is another example of Microsoft standing behind our SharePoint Server customers as we continue to meet their strategic needs. We look forward to sharing more examples soon with the upcoming release of SharePoint Server Subscription Edition Version 23H1, the next feature update for SharePoint Server Subscription Edition. Stay tuned!
The above is kindly provided by the Microsoft Tech Community!