Enter duration/end time manually in state timeline

Is it possible to enter a duration or end time in the state timeline. This is possible in the Gantt chart (marcusolsson-gantt-panel).

Because this plugin is not maintained any more, so I want to switch to the state timeline (or another plugin)

If I use the same kind of data, the following state timeline is shown:

The problem is that there is no end time for these intervals