Thanks for the suggestion. We’ll consider it. In the meantime, please try opening the same notebook twice in two windows, which is possible after updating to iPadOS.
An error occurred while saving the commentJacob Shapiro commented
The "try this instead" is not really helpful because the whole point of a two-page-at-a-time navigation (like macOS Preview's "View -> Single Page / Two Pages / Continuous Scroll" feature) is that you can quickly see a lot and flick through many pages quickly. If you open two windows of the same document you would have to keep turning pages independently on both windows--what??