
Tap on each individual email account and make sure that Notes are turned on for each account.

If you haven’t found your notes yet, the next place we’ll check is in Settings -> Notes -> Accounts. Tap on each folder to see if your missing notes are stored inside. The first place to check for your missing notes is in each individual folder. Tap on that arrow and you’ll see a list of all the accounts that are currently syncing notes on your iPhone. Open the Notes app on your iPhone, and look for the yellow back arrow in the upper left-hand corner of the screen.

How Do I Know Where My iPhone Notes Are Stored?
