So I got my hands on a larger iPad and it works as shown on the screenshots above with the left rail/nav properly showing in landscape mode.
The problem is if the screen is not wide enough (iPad mini, Samsung Fold, etc.) it just cuts off the left rail.
Ideally at that break point it would automatically switch to a mobile layout.
There’s basically this subset of devices bigger than a phone but smaller than a regular size tablet where it just doesnt work correctly.