Right now there’s no telling from the link alone if it’s has been deleted (still in Trash) or if the note doesn’t exist or if it’s been archived.
Currently there’s a small pencil icon next to a link to a url. However, would be great if something similar or through colour coding could be done to notes with the other conditions. This would make it easier to clean-up/groom notes.
See example of issue,
Mock-up,