Bug 424764

SUMMARY
Although basic F2FS support does exist, Calamares depends on the existence of the f2fs-tools package (and the mkfs.f2fs command in particular) as a prerequisite for showing F2FS as an option for formatting partitions to install the system to.

Since GRUB 2.04 now supports booting from F2FS partitions out-of-the-box, the fact that the installer doesn't allow one to select F2FS as a destination install option is a problem.

STEPS TO REPRODUCE
1. sudo wget -O /dev/sdd https://files.kde.org/neon/images/focal-preview/unstable/current/neon-unstable-current.iso #replace /dev/sdd with your USB drive
2. sudo systemctl reboot --firmware-setup
3. Set USB device as first boot option, then exit
4. After booting into Live USB, open Konsole and type "mkfs.f2fs --help"

OBSERVED RESULT
"Command Not Found" message

EXPECTED RESULT
mkfs.f2fs usage message

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Neon Dev/Unstable (Focal 20.04 rebase)
(available in About System)
KDE Plasma Version: 5.19.80
KDE Frameworks Version: 5.73.0
Qt Version: 5.14.2

ADDITIONAL INFORMATION