just wait
u wait some time? the installation is very slow. u need wait
u need wait solution from devs if don't work for u. the proble is about lilu, etc
all kexts is updated?
use vesa mode
-igfxvesa
https://www.olarila.com/topic/8918-opencore-vanilla-guide-step-by-step-full-dsdt-patched-or-ssdt/
https://www.olarila.com/topic/8930-guide-easy-brightness-hotkey-remapping/