Thanks for help, but it didn't help :(
I've updated all drivers from Acer page, including updating BIOS.
This changed nothing, so I've updated drivers from AMD and NVIDIA pages (i have integrated AMD and dedicated NVIDIA), but again, nothing.
We have 6 same laptops in company, 4 on win10 and 2 on win11. On win 10 everything works normally, and on win 11 on both there is that strange zoom that i don't understand.
After some research, when I unplug external display and plug it again, same thing happens, but again, only on win 11, on win 10 it's fine.