Use Switch Control to navigate your iPhone, iPad, or iPod touch - Apple Support

Universal Control: Use a single keyboard and mouse between Mac and iPad - Apple Support

iPod touch - Official Apple Support

Securely control whom you share content with from iPhone, iPad, and Apple Watch - Apple Support

Access Control Center on your iPhone - Apple Support

iPad User Guide - Apple Support

Control Apple TV with iOS or iPadOS Control Center - Apple Support

How to control iPad remotely on iPhone, and Mac

Close an app on your iPhone or iPod touch – Apple Support (UK)

Use AssistiveTouch on your iPhone, iPad, or iPod touch - Apple Support

How to customize Voice Control commands on your iPhone, iPad, and iPod touch - Apple Support

Use Airplane Mode on your iPhone, iPad, iPod touch, and Apple Watch - Apple Support

iPhone User Guide - Apple Support