When looking at the Table of Contents, I can see page numbers listed next to each section/chapter. But when I'm actually reading the book, there are no page numbers shown on the page (either desktop or mobile). I can see the percentage at the bottom, indicating how much of the book I've read. But I don't know which page I'm on.

So for example, if I'm reading a chapter and I want to know how long I have left until the next chapter, I have no way of knowing. I can see from the table of contents that the chapter is 10 pages, but while I'm reading I don't know how many pages I've read or have left to read.