Now, iPhone has a recently deleted folder for users. It will save all the deleted notes from your iPhone within 30 days. So you can restore the deleted or lost notes here. If you can't find the deleted notes in that folder, you need to restore your iPhone with backup file. If you don't have backup file, the only way to get back your deleted notes from iPhone 7 is to use iPhone Data Recovery. You can learn how to recover deleted notes on iPhone 7. Besides notes, you can also recover other data, such as messages, photos, videos, contacts, etc.