Customize sharing options in an iPad app - Apple Support (KW)
How to set up and use iCloud Photo Library on iPhone and iPad
How to use Shared Albums in Photos on your iPhone, iPad, and Mac - Apple Support
Switch an app window to a Slide Over window on iPad - Apple Support
Photos User Guide for Mac - Apple Support
Use the People & Pets album in Photos on your iPhone, iPad, or iPod touch - Apple Support
Use photo albums in Photos on iPad - Apple Support, Picture Albums
Get started with Screen Time on iPad - Apple Support (CA)
Use Guided Access on iPad - Apple Support
Merge duplicate photos and videos on iPad - Apple Support
Send and reply to messages on iPad - Apple Support
How to use Shared Albums in Photos on your iPhone, iPad, and Mac - Apple Support