Vertical OEM 14.0.0 (groups) 14.1+

for extra screenshots & older versions : https://gbatemp.net/download/vertical-oem.37393/

https://themezer.net/packs/Vertical-OEM-14.0-3e1
UPDATED for HOS 14.0.0
You'll need sys-tweak to get icons working correctly.
Be sure to update NXThemes Installer to 2.7 it has the new lockscreen IPS patches

the icon ratio is 2:3 and fully supports https://github.com/Slluxx/IconGrabber (made by sluxx)

but you can also use NX-GIC icons to mass transfer icons as a temporary measure https://github.com/sodasoba1/NSW-Custom-Game-Icons/wiki

sys-tweak guidance: https://gbatemp.net/threads/custom-game-icons-tutorial-and-sharing-hub.574675/

sys-tweak (tested on 14.0.0|AMS 1.3.0|S) : https://gbatemp.net/threads/custom-game-icons-tutorial-and-sharing-hub.574675/post-9738297