Change your Notes settings on iPhone
Customize your preferences for the Notes app in Settings. You can store your notes in iCloud, access Notes from the Lock screen, and more.
Keep your notes up to date on all your devices with iCloud
Go to Settings > [your name] > iCloud, then turn on Notes.
Your iCloud notes—and any changes you make to them—appear on your iPhone, iPad, iPod touch, and Mac where you’re signed in with your Apple ID.
Change your Notes settings
Go to Settings > Notes, then adjust any of the following:
Default Account: Choose the default account for Siri and the Notes widget in Today View.
“On My iPhone” Account: Notes in this account appear only on your iPhone. Your notes in iCloud aren’t affected.
Access Notes from Lock Screen: Choose Always Create New Note or Resume Last Note. Or turn it off to prevent access from the Lock screen.