@SonofGod1998 Hi there, so it's been a good long time since I've talked about this, but I've found a solution for those still interested in using text to speech on mobile (like me). Since TalkBack is treating the book like an image, it has given me the option to "describe it" and then it'll recognize the text and read the extracted text like normal. The only downside to this is that it can't automatically keep reading like before, instead I have to keep swiping and make it describe the next page each time, but just to stay up with the series, this is good enough solution.
As for iPhone users, my sister uses an external app that does the same function, just screen shoots the pages and makes the tts app to read the extracted text from the image/pages.
TalkBack Describe Image