Railworks America

In this picture, the Object Name of this building is "Scenery~Buildings~GX_LocomotiveShop01.xml" but I cannot find a file with any of that name anywhere on my drive, so how do I figure out what asset folder it's in?

If you include .xml in the search term you won't find the file.
(.bin files are used in the game not their .xml counterparts.)
The GX gives you the clue that it's a scenery object from a G-Trax route.
Searching the Assets/G-Trax folder with the search term GX_LocomotiveShop01 gives me the result
G:\SteamLibrary\steamapps\common\Railworks\Assets\G-TraX\BLE\Scenery\Buildings\GX_LocomotiveShop01.bin
So the loco shop is from the BLE route.
Hope this helps

Nvm, comes from not unpacking all the relevant .ap files...I need to get better with TS Tools