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You can add any classic Windows app (the kind that run in a desktop session) to the Start screen. Those tiles look like the ones shown here, with a tiny icon and a big text label.
Swipe the tile down if you have a touch screen. If you're using a mouse, right-click to select a shortcut tile. In either case the result is shown by a check mark on the icon, as with the Windows PowerShell Modules tile here. Selecting the tile also opens the app bar at the bottom of the screen, with the commands and options shown here.
To pin an app to the Start screen, use search to find the app, then right-click its entry in the results list and click Pin on the app bar. From the Start screen, click Unpin to remove the shortcut tile.
Clicking Advanced opens the list of choices shown here, which include options to pin the selected app to the taskbar on the Windows desktop or run the program as an administrator.