Carpentry tends to span beyond direct woodworking. Installing Drywall over steel studs is one example that might apply to DC construction.

>Carpentry is a skilled trade and a craft in which the primary work performed is the cutting, shaping and installation of building materials during the construction of buildings, ships, timber bridges, concrete formwork, etc.

https://en.wikipedia.org/wiki/Carpentry

There is frequently wood in buildings yes

Not usually, but the same standard framing and drywall techniques work using the more modern steel stud systems. Here are a few that came up at the top of a DDG search you can peruse to update yourself.

https://studcosystems.com/

https://www.clarkdietrich.com/products/structural-studs

https://www.steelconsystems.com/