This question was about installing F2FS, which is supported by Ubuntu via a module in the default kernel of version 22.04. However, it was discovered that the question pertained to a WSL2 installation, which uses a different kernel that does not appear to include F2FS support (which makes sense from my point of view).
When Ubuntu is virtualized, the hardware drivers of the host are used. Are some drivers, such as WiFi and filesystems, only supported in non-virtualized installations?