This step by step guide covers two ways to use Reader View on iPhone and iPad in iOS 13 and iPadOS 13 since the feature has been changed.

You can invoke Siri on your iPhone, iPad, or Mac computer to read almost any text that's on the screen aloud.

How to Cut, Copy, and Paste Using Gestures In iOS 12 and earlier, you had to select text and then use the contextual editing menu bar to cut, copy or paste it. In iOS 13, you can use gestures instead.