Notes folders and items in the folder are empty but was all fine last night.
As of this morning, all of the folders and content in the folders on the Notes app are missing. The App is on my phone.
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.