This tutorial explains how to draw a building section for a small wood frame house or Accessory Dwelling Unit in Revit. It uses some detail items overlayed on the building geometry.
Revit typically puts them under Program Data > Autodesk > RVT 2021 > Libraries > US Imperial To see the "Program Data" Folder, you need to show hidden folders in your windows browser. See below on how to do this: support.microsoft.com/en-us/windows/show-hidden-files-0320fe58-0117-fd59-6851-9b7f9840fdb2
