I designed this but what would be a proper name? Data-table, info bar, list? When you click on each item of the list, it displays information on the right side. Programming wise it was not done as a data-table TH
This is a list (or data table) with an inspector panel on the right side.
It is a variation of a master / detail pattern.
I'd say list or table, but as you have column headings, I'd go with table.
You might want to see how design systems from well known companies describe them: https://adele.uxpin.com/
I would call the right pane "Details Pane".
Alternatively it can be called "Preview Pane", if it is only showing a subset of information for the item and there's another view with the full info. Preview is the term used in Windows Explorer and OSX Finder.