The enclosed power supply unit is far too small to supply a laptop. The manufacturer's website also states that the power supply is only for the dock.

I also have no power supply to my laptop with the dock. What is the truth? Unfortunately, there is also nothing in the description about a USB-C output power. I didn't assume that such a device would even exist without a power supply. Ultimately, the goal is to be able to do everything with just one cable.

Charges flawlessly, HP Elitebook and HP ProBook.

The power supply is connected.
It charges the way you connect it.