You can now pace a long page without splitting it into several pages. Add a Buttons tile with a single button in its own row and turn on Page break. Everything below it stays hidden until the learner presses the button. Then the next rows fade in and the page scrolls to follow.
Add more page breaks further down to reveal a page in stages. Narration for hidden content waits until it's revealed, and learners can't finish the page while a break is still closed. In the editor, hover over the button to highlight the rows it reveals.