If you can't share or collaborate in the Notes app on your iPhone or iPad - Apple Support

To share or collaborate in the Notes app, everyone needs an Apple device with the latest operating system and enough storage. You can also use iCloud.com.

Draw or write in Notes on iPhone - Apple Support

Write This Down: 17 Things You Didn't Realize Apple's Notes App Could Do

Share Freeform boards and collaborate on iPhone - Apple Support

Share lists and collaborate in Reminders on iPhone - Apple Support

The Best Features in Your Notes App's Latest Update for iPhone « iOS & iPhone :: Gadget Hacks

Collaborate on projects with Messages on iPhone - Apple Support

Annotate books in the Books app on iPad - Apple Support

Modify files, folders, and downloads in Files on iPhone - Apple Support

Collaborate on projects with Messages on iPhone - Apple Support

How to Share Notes on iPhone? What to Do If You Can't Share? - MiniTool

Apple Notes: Everything You Need to Know [2023] - Paperlike

Use iPad as a second display for your Mac - Apple Support

Use Notes on your iPhone, iPad, and iPod touch - Apple Support (CA)

If you're missing notes on your iPhone, iPad or iPod touch – Apple Support (AU)