It can be, as not all combinations are supported anymore. However for 455xx Nvidia drivers we have now these packages:
core/mhwd-nvidia 455.45.01-3
extra/linux[xxy]-nvidia 455.45.01-X
extra/nvidia-utils 455.45.01-2
extra/opencl-nvidia 455.45.01-2
multilib/lib32-nvidia-utils 455.45.01-3
multilib/lib32-opencl-nvidia 455.45.01-3
opencl is optional. manjaro-system should take care of the mhwd profiles, if it finds a valid one.