A protected note is missing

Hi ProblemswithMacBookChris,

Thanks for coming to Apple Support Communities for help today.

This article may help find your note: If you're missing notes on your iPhone, iPad, or iPod touch. Try searching for it and checking your Recently Deleted Folder.

"Check your Recently Deleted folder

If you store your notes on iCloud, check your Recently Deleted folder:

1. Open Notes, then tap the back icon  until you see your Folders list.
2. Tap Recently Deleted and search for your note.

If you find your note in Recently Deleted or in another folder, you can move it:

1. In the Notes list, tap Edit.
2. Select the note that you want to move.
3. Tap Move, then select the folder you want to move it to.

If you use notes with another service, like Gmail or Yahoo, check the Trash folder of that account in the Mail app. If you delete a note from the Notes app, your third-party account will usually keep it in the Trash folder. To recover a note from the Trash folder, you need to copy and paste the note to a new note in the Notes app."

Have a fantastic day!

unfortunately in my case it didn't help. I only have the notes in iCloud and since something has changed in terms of protection, the operating system has automatically duplicated the notes. one of the two has no content. modifying the one with the content on iOS, once opened on Mac it disappears…