I think there was just a court decision that a federal officer can do suspicionless search and seizure on any vehicle within a hundred miles of the border (which covers almost all of Florida). Extrapolation to State and Local officers should be easy in Court.
The search occurred in Maryland, about 1000miles from MD.
That decision is limited to immigration issues, which means that border patrol can conduct checkpoints and stops to look at immigration status. It doesn’t mean they can search for contraband. It also doesn’t relief BP of the responsibility to adhere to the SCOTUS decision regarding search incident to arrest, which is supposed to limit fishing expeditions.