A reference of what this would look like would be the Search on Internet plugin, with the “Open in iframe” setting being turned on, where searching for something opens an iframe on a new pane. This iframe is not embedded on a note, but occupies the entire pane.
I was wondering if I could create a link to an iframe like that, where instead of it showing as an embedded website from the note in preview mode, it would open in a new pane that’s fully occupied by it (and always in preview mode, instead of showing <iframe> text).