Please help me about transfer data via type-c port

My Product: HyperDrive VIPER 10-in-2

I just bought the hub.
I have used keyboard connect via type-c to type-c in hub, but keyboard not working, light on only.

I have question to official store, they said that type-c port only support power transfer, not support data transer.

Please help me confirm above problem, also explain reason why cannot ?