Text to speech on Android
Go to Settings -> Accessibility. Make sure that "Select to Speak" is enabled. Then, an icon will appear in the screen.

If you don't have "Select to Speak", download and install Android Accessibility Suite. "Select to Speak" will then be listed among the accessibility services.

To read a text aloud, press the icon, select the part of text you want to read. You will then hear it. You can change the speech rate and pitch by going to Settings -> Accessibility -> Text-to-speech output