No Vulkan implementations, even though it should be

I've ran into issue with steam not starting my games. So, I decided to check what Vulkan implementations I've got. Arch wiki suggests doing
ls /usr/share/vulkan/icd.d/
But there are no /usr/share/vulkan/ at all! All the packets wiki suggests to install (vulkan-icd-loader, nvidia-utils) are installed, but, apparently, there is some kind of issue I can't detect. What am I doing wrong here?

If it matters, I'm running video-hybrid-intel-nvidia-440xx-prime with optimus-manager to switch GPUs. But those worked on Manjaro-GNOME, so I don't think it's the case here

What is the output of the games not starting?

You can launch steam via the terminal, the launch a game in steam, then find the output.

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