The article is... premature. The only "source" seems to be the appearance of the "bus1" project on GitHub. The author observed that the primary 2 contributors

The article is... premature. The only "source" seems to be the appearance of the "bus1" project on GitHub. The author observed that the primary 2 contributors to this project are Kay Sievers and David Herrmann, who also happen to be systemd developers. This project isn't linked to systemd in any way but that. The only other contributors are Harald Hoyer and Lars Uebernickel. Note that Kay Sievers was a Linux kernel contributor before systemd even existed (I don't know about the other 3, perhaps they were too). Kay, David, and Harald are all Red Hat employees, and Red Hat has mentions in the copyright statements, leading the author to suggest that this is an official Red Hat project. It could be, but it could also be that RH just owns the copyright because it's too similar to what they do at work, but it's cool because RH is fine with them open-sourcing everything. But also "notable" is that Lars is a Canonical employee, which receives no mention in the article.