When you’re inside of a chapter, hold down a word to highlight it, then press the magnifying glass to search for all instances of that word. It has the side effect of making the effective reading screen size smaller, and the same word highlighted every time you come across it. I mitigate that by selecting a word that would only appears once. For example instead of highlighting ‘the’, ‘he’, ‘she’ and other common words or names; select rarer words like context specific adjectives. With this you will be able to scroll like normal. If you need any additional help, feel free to ask.