At some point, Valve quietly tweaked the specifications for the upcoming official Steam Deck Dock and it's actually better than what they said originally. We still don't even know exactly when it will be out, and they likely want to improve the overall docked experience first as there's quite a few quirks (especially in desktop mode).
Originally, the Steam Deck Dock listed it had 1 x USB-A 3.1 Port and 2 x USB-A 2.0 Ports along with Ethernet. Now though, it states it has 3 x USB-A 3.1 Ports and Gigabit Ethernet.
Seems this was updated in February, when checking the Wayback Machine it shows the text specifications with the original on February 12 but then the text was updated sometime around February 22 to note the newer ports. Later around February 25 the actual image of the Dock was updated to also note it has Gigabit Ethernet too.
Seems Valve are also now calling it a "Docking Station", which was noted around February 22 too.