Looks like there is mix of plasma5 bits and plasma6. While plasma6 installation is not fully covered.
Try installing
sudo dnf install task-plasma6 task-plasma6-minimal task-plasma6-wayland
if package is installed remove it with
sudo rpm -e –nodeps task-plasma6
sudo rpm -e –nodeps task-plasma6-minimal
sudo rpm -e –nodeps task-plasma6-wayland
and then install again with
sudo dnf install task-plasma6 task-plasma6-minimal task-plasma6-wayland
I suspect there may be package conflicts with the p5 version. But let’s try; at most, you can remove the conflicting packages from p5.