Hi,
I had some screen artifacts when the refresh rate on the laptop monitor is set on 120hz on my Lenovo IdeaPad Pro 5 14AHP9.
I have found several complaints online of this issue also with other laptops that (probably) use the same 2.8k 120hz display.
The workaround is to apply a kernel parameter. Since most of the solutions are based on normal distros, this what has to be used for distros based on silverblue
sudo rpm-ostree kargs --append=amdgpu.dcdebugmask=0x10