Missing the whole Fedora timeline. I was emailed by "Jia Tan" between Feb 27 and Mar 27, in a partially successful attempt to get the new xz into Fedora 40 & 41. Edit: I emailed Russ with the details.
I wondered about this. I saw the note at the bottom "RedHat announces that the backdoored xz shipped in Fedora Rawhide and Fedora Linux 40 beta" but saw nothing in the timeline explaining when/how it made it into Fedora.