I had the same issue, so back here to share my solution:
My Framework 13 AMD on fedora had some annoying graphical artifacts that were a known issue by then (dec 2023). I therefore used the solution provided in the guides and added a kernel flag:
sudo grubby --update-kernel=ALL --args="amdgpu.sg_display=0"
After upgrading to kernel 6.13 the artifacts were back. After I removed the flags (so back to default) the artifacts were gone.
sudo grubby --update-kernel=ALL --remove-args="amdgpu.sg_display=0"