Word of warning, if you lock your phone and you're not familiar with the voice over input it can be really annoying to unlock your phone...Seems to turn off face id as well?
You can ask Siri to turn off voice over and all is well.
You can ask Siri to turn off voice over and all is well.
Right down the bottom of Settings > Accessibility.
Edit: you can also enable screen curtain in iOS (and watchOS!), which means your phone can operate with the screen completely off when in VoiceOver.
Good for privacy / battery!