How to build this “custom card on hover” introduced in this article?

Article: https://learn.microsoft.com/en-us/sharepoint/dev/declarative-customization/formatting-advanced

I want to show history status like this article showed in “custom card on hover” section. But what was the setting? For example, is that status column lookup type? Looking up another list? If so, what is the type of that column being looked up? What are the value in that column to have such historical process status?

Please help, thanks!