Notes disappeared after updating my iPhone
I was requested to update on my phone and all my Notes are gone!
[Re-Titled By Moderator]
iPhone 13 Pro Max, iOS 17
Open the Settings app.
Tap on your name at the top (aka your Apple Account settings).
Tap on iCloud.
Tap on Notes.
Turn on "Sync this iPhone" (green = on). If it is already on, turn it off and on again.
In the Notes app, wait several minutes for your notes to be restored from iCloud.