Did I miss a briefing where landscape was "the whole point" of owning a tablet?
My partner is definitely landscape first using her tablet. I am consistently portrait normal.
Is this how we split the tribe? Do I fail to enter Canaan because lapped instead of scooping into my hand?
You can try changing your zoom or browser settings to see if you can get the mobile view instead.
Which website is this for, BTW?
Usually web sites hide some elements in a menu widget on narrow displays. The functionality is all there but presented for the display width. Look for the “hamburger” menu, three horizontal lines.
Web sites not designed to display properly at various widths should just scroll horizontally.
Because phones greatly outnumber tablets or computer screens for most web site visits it would surprise me to find a major public web site not optimized for phone display, typically portrait orientation.
What I can say is that a lot of apps and websites don't quite look right in portrait mode, which is a shame. They occupy the awkward middle ground between the mobile layout (optimized for portrait, but for small screens) and the desktop layout (optimized for a large screen, but for landscape)
I would assume though that the news websites you've encountered were built with only office PCs in mind though, and just happen to work on the similar screen of a landscape tablet.
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.