Can't change screen brightness

also see that the intel driver could be an issue. because your output displays no driver.

Graphics:
Device-1: Intel UHD Graphics 620 driver: N/A

might be worth having a read:

https://wiki.archlinux.org/title/intel_graphics

and check this post in the forum since its the same graphics Intel UHD Graphics 620, and might need those packages depending on kernel.