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.

How to draw with friends in Notes on iPhone, iPad, and iPod touch — Apple Support

Invited users cannot access shared notes - Apple Community

How to Make a Shared Note & Collaborate on an iPhone (iOS 17)

Can not open shared notes - Apple Community

Collaborating a note not working - Apple Community

Use Check In on iPhone to let your friends know you've arrived - Apple Support

iOS 16: Everything New With Notes and Reminders - MacRumors

Share Freeform boards and collaborate on iPhone - Apple Support

Setup basics - Apple Support

Share notes on iCloud.com - Apple Support

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

Sharing and collaborating on notes: a guide for Apple users

iPad User Guide - Apple Support

How to share notes on an iPhone - Android Authority

The Ultimate Guide to Apple Notes – The Sweet Setup