Through a LinkedIn Post, Adam Gent asked a question to Garry Illyes about an issue that you may have encountered in GSC.

And, the issue is about “URL is unknown to Google”.

Adam asked, Does URL is unknown to Google issue have the lowest crawl priority for the Google?

In response to this question, Garry Answered that “URLs encountering this issue in GSC are simply unknown to Google and hence these URLs have no crawl priority at all.”