How to use a pointer device with AssistiveTouch on your iPhone, iPad, or iPod touch - Apple Support

Use iPhone as a level - Apple Support

The Ultimate Guide to Customizing Your iPad Mouse with iPadOS

Mark a device as lost in Find My on iPhone - Apple Support

How to use a mouse or pointing device in iOS 13 for iPhone/iPad

Add and use passes in Wallet on iPod touch - Apple Support (MT)

iPad User Guide - Apple Support

View maps on iPod touch - Apple Support (MK)

Mark a device as lost in Find My on iPod touch - Apple Support (MT)

Type with the onscreen keyboard on iPhone - Apple Support

Use iMessage apps in Messages on iPod touch - Apple Support (MZ)

Add reminders on iPod touch - Apple Support (CA)

Reach the top of the iPhone screen with one hand - Apple Support

Use AssistiveTouch on iPhone - Apple Support