I don't understand half of the stuff you just wrote. I just selected the SSD in the installer and told it to install the OS. Why make things more difficult?
Because I want a data partition that I can keep if I decide to switch to a different distro. Or because I already have a data partition I want to keep. Or because Iām doing something that requires some space backed by a different filesystem.
Most old distros can do things like this with no particular difficulty. But the Kinoite installer (which is presumably the same as the Silverblue installer) is half-baked and buggy.