Hi! Switching from the graphical installer to a different virtual terminal is awkward in QEMU because the host system intercepts <ctrl-alt-F1 ... ctrl-alt-F12>. So QEMU isn't aware it needs to switch to another TTY.
Usually this is quite easy to work around by using <ctrl-arrow left/right> to switch from one TTY to another, however this doesn't work in TTY1 with the graphical installer. So I ended up having to work around that by entering QEMU's command line <alt-ctrl-2> and writing: "sendkey ctrl-alt-f3" and returning to the VM via <alt-ctrl-f1>. My proposed solution would be to ensure this is documented and that the graphical installer itself ignores/passed through <ctrl-arrow right>. Cheers, - Xander.