Why are there so few good landscape UI’s for phones?

The landscape keyboard on iOS is rubbish, it wastes so much space and has buttons in bad places out of natural reach of thumbs.

I know most people have learnt to use their phone in portrait mode, but I think this is just a hangover from Nokia days and the T9 keyboards.

Touchscreen should be landscape for ergonomic reasons but the landscape UI is dreadful.

🤔

Looking at the portrait keyboard it wastes so much space, huge empty unused real estate at the bottom of the screen.

How is this the best implementation? It just seems lazy, “people got used to it, so now its the standard.”