Valve has officially launched a docking station for the Steam Deck called the Steam Dock. It offers a wide range of connecvity options such as a DP port, HDMI port, USB-Type-A/USB Type-C ports and an Ethernet jack. One can purcahse it from Valve's website for US$89. https://www.notebookcheck.net/Steam-Dock-for-Steam-Deck-now-available-for-purchase-at-US-89.660055.0.html
I'm still waiting that steam keyboard folio