Update your devices
Make sure that you and the person you're trying to share or collaborate with have the latest version of iOS or iPadOS on your iPhone, iPad, or iPod touch. You can't collaborate on notes with someone using a non-Apple device.
If you have any notes with drawings that were made before iOS 13, update these drawings in Notes to use the latest features.
Sign into iCloud and share with Apple accounts
Sign in to iCloud with the same Apple ID on all your devices. iCloud allows you to store, share, and collaborate on notes across devices.
To share a note using email, send the sharing invite to your contact's Apple account. To share a note using Messages, make sure your contact can receive iMessages. Some Notes collaboration features won't work unless both users are logged into iCloud.
Make sure everyone has enough storage
You need enough storage available in iCloud and on your device to collaborate on notes. You can make space or upgrade to iCloud+ for more storage.
Make sure the person you're trying to share with also has enough storage available. You might not see changes that were made to shared notes if there's not enough storage on your device or in your iCloud account.
Check whether your notes are locked
You can’t share password-protected notes. If you want to share or collaborate on a password-protected note:
- Select a note then tap View Note to unlock it with Face ID or your password.
- Tap the More button .
- Tap Remove to remove the password protection.
You can now share or collaborate on the note.