Can I recover a deleted iCloud note?
From my own testing, it seems to depend on how you delete the note...

If you delete the note on iCloud.com:


You can easily recover the note by going to the Trash folder.


If you delete the note on an iOS device:


You can recover the note by restoring the device (if it's been backed up).
You can recover the note from a device that hasn't recieved the latest sync changes.