you can collaborate with others by sharing a note or a folder. Anyone you add receives a link to open the note or folder of notes in the Notes app. You can also manage shared notes and folders by removing access, hiding notifications and more.
How to share a note
Open the Notes app
Click the note you want to share
Click the Share button
You can choose Mail, Airdrop, Messages, and Reminders
With any option you select, fill-in the recipient's name(s) to send