On Tumbleweed installer, when selecting keyboard "Finnish", it results in
"fi-kotoistus" in /etc/vconsole.conf. Gnome is not aware of such layout,
resulting in non-working keymap in Gnome desktop, gnome-settings listing input
source as "fi+kotoistus", and you need to change it to "Finnish" or "Finnish
(classic)" to have working keyboard.

On Aeon, keyboard selection is done with gnome initial setup. It has options
"Finnish" and "Finnish (classic)" (as above with TW gnome-settins).
1) "Finnish" results in "fi" in /etc/vconsole.conf, but fi.map.gz does not
exist in openSUSE, resulting in failing unit systemd-vconsole-setup
2) "Finnish (classic)" results in "fi-classic" in /etc/vconsole.conf, and
everything works fine

So both TW and Aeon are broken if you simply select obvious choices "Finnish".
TW in GNOME, Aeon in form of failing unit during boot. On TW, selecting
"Finnish" does not alter /etc/vconsole.conf anymore, so it does not break it,
only initial setup with Aeon.

Other distros (Debian,Arch for example) ship with "fi" map, and works as
should.