Move Apple Notes from Mac to iCloud
If you turn on iCloud after already creating notes in the Apple Notes app, those notes will be local to the device, and are not automatically added to iCloud.
To add local notes to iCloud manually you can select an item, and then move it to a new list by dragging the &quot;Notes&quot; folder under the &quot;On My Mac&quot; list to the iCloud list.
On macOS you may have a move all option as well.