No signs of Anaconda Installer behavior in the screenshots below might be noticed in the Fedora 39 development branch up until 09/16/23. Actually, I’ve followed link suggested in final rows of article https://www.debugpoint.com/fedora-39-features/ . In particular , the iso image Fedora-Workstation-Live-x86_64-Rawhide-20230916.n.0.iso has been used for virt-manager

Source: LXer – Anaconda F40’s Advanced Partitioner (Blivet-GUI) on Fedora Rawhide