As part of https://github.com/theforeman/foreman/commit/bb4633bcd4facc339a8099f4a8e89312323d8b61 which was applied to solve https://projects.theforeman.org/issues/28521 , the lines:

 exec < /dev/tty3 > /dev/tty3

have been removed from the "Kickstart default" template. For this reason, Kickstart installation now switches to an empty Anaconda (root) TTY during post installation, not showing any output from the actual post installation phase, which is quite irritating during postinstall.