Sharing of notes in the Notes app.
Can you share a “Locked” note with other people via the Notes app, while providing the password to the other people?
iPad Pro, iOS 12
Hello. No, you can’t share password-protected notes. If you wish to share a note that is password-protected you need to remove the lock first before sharing. This support page explains how to remove the lock.
Lock notes on your iPhone, iPad, iPod touch, and Mac - Apple Support