Type with the onscreen keyboard on iPad - Apple Support

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

Use predictive text on iPhone - Apple Support

Use the floating keyboard on your iPad - Apple Support

Virtual keyboard - Wikipedia

Change the wallpaper on iPad - Apple Support

Type with the onscreen keyboard on iPhone - Apple Support

Type with the onscreen keyboard on iPad - Apple Support

Apple Smart Keyboard: iPad Keyboard and case for iPad Pro 10.5-inch, iPad Air (3rd Generation), and iPad (7th, 8th, and 9th Generation), Comfortable Typing Experience, US English - Black : Electronics

How to Use the On Screen Keyboard on an iPad Pro With Keyboard Connected - MacRumors

A larger screen gives Apple's iPad Pro a more fully-featured virtual keyboard