However, I have been unable to do so since the Log4j GitHub project is under the Apache organization which I don’t have sufficient privileges on to properly integrate with Graylog Marketplace.
GitHub Releases are the only supported source of information on the Graylog Marketplace at the moment. So if you’re not using GitHub Releases, the information on the marketplace will be blank.
Currently the release information is not blank, it is misleading when saying “No releases yet” which suggest that it is a brand new project which is expected to make releases in the future.