The info is supplemental to what is considered to be a credit report, and thus does not have to appear on your pulled credit reports.
Similar to how your FICO score is not part of your credit report; it's a separate paid service that the credit unions pay for so they can charge their own customers.
That data has been breached but it hasn't (and likely won't considering it was most likely a nation-state actor who was responsible) be released to the public. Even if it were it takes some sophistication to find the torrent, download it, import it into a database, and query that database. There's nothing easily accessible about it.
Similar to how your FICO score is not part of your credit report; it's a separate paid service that the credit unions pay for so they can charge their own customers.