There is off-the-shelf technology to make a website work in both portrait and landscape mode.
But good design is done by hand, and portrait and landscape are two separate designs if aesthetics are important. When someone cares, it is going to be more work, probably more than twice as much.
That more work is doesn't enhance the core function of a news organization. Having a clear way of presenting information is within the core function. A second clear way might be, but audio or video or RSS or Mastadon are probably more likely to be than the other of landscape/portrait.
...Aside, try Ali Express which only works in portrait with the iPad power port pointing down. But as Steve Jobs said...good luck.