You’ll be interested to read about aspect ratio: https://en.wikipedia.org/wiki/Aspect_ratio_(aeronautics)

As the ratio of the span to the chord increases, the ratio of lift to drag increases as well.

The drag of an object in the sense of forcing its way through the air (eg a semi truck on the highway) is important, but for airplanes there is also a very important phenomenon of drag due to lift (“induced drag”). It’s kind of non-intuitive. But if you’ve ever seen those strong vortices coming off a wingtip, you’re seeing induced drag. Think of the energy creating this: https://youtu.be/uXrnGiIMGLs

It’s energy created by propulsion but turned uselessly into spinning air.