Here is an openSUSE article Dual GPUs ("Optimus") - openSUSE User Documentation Project It is advanced for my understanding right now and may not be the article but it’s interesting. Advanced users will no doubt know more.
Here is some additional information :< [FEATURE REQUEST] - Allow GPU Selection on BIOS. - Republic of Gamers Forum - 955480
There is a GitLab Asus Linux page :< asus-linux · GitLab which includes asusctl a control daemon.
Can launch kate from Konsole by passing sudo -E kate /etc/default/grub finish modifications and save. Then pass sudo update-bootloader --refresh to update grub. I believe that passing sudo grub2-mkconfig -o /boot/grub2/grub.cfg is essentially the same result. Need to powercycle machine for changes to take effect.