I created a plugin that displays the metadata from all the links present on the note.
This plugin displays the website URL, the Title, the description as well as the oc:image. You can toggle the panel by cliking on the "link" icon on the WYSIWYG editor. It is also possible to put the panel on the bottom of the note by changing the application layout.
Link of the repo: Plugin: Link Metadata
I worked on it only today so I guess it could be better optimized. The regex to find links is not perfect, but it's a good start. If you see an issue, please report it here. Or even better, fix it and create a pull request!