“USB-C is a specification of a connector, intended to use for USB by default, but also for other protocols”
One plug now carries USB 3.0, USB 3.2, USB4, DisplayPort, Thunderbolt and up to 100 W of power. The cable looks identical whether it does 4 Gbps or 40. You need a long blog post with lane diagrams to buy a dock. Universal was the selling point.