I would have theoretically said the same thing that the sibling comments are about getting north to be "up". But, that is already the default (at least on my phone), but who knows for how much longer. The app quite aggressively tries to keep you from getting comfortable with this mode but instead wants to derail your sense of direction in general.
First, it was a minor inconvenience to lock your orientation, then they hid it deep inside a settings menu, before eventually removing entirely the ability to lock the map to the cardinal directions, and everyone I complain about this to acts like I'm crazy.
I've long ago given up. I don't get it.