You can access data from deleted forks, deleted repositories and even private repositories on GitHub. And it is available forever. This is known by GitHub, and intentionally designed that way.
Thats probably what did it. Guess when given the options of let us track you or provide your real identity for us to track you. The option of fucking off is best.
I've been migrating all my services hosted in UnRaid to ProxMox these last days, but Forgejo is absolutely on my list of new services to selfhosted. Thanks for the tip bud.