Valve updates SteamOS to improve your WiFi download speeds, and it's available on Steam Deck with a couple of caveats
Valve has released SteamOS version 3.8.14, which addresses an issue that limited WiFi download speeds on devices connected to routers that incorrectly advertise their MCS requirements. A beta version, 3.8.22, is available for Steam Deck owners through the Beta and Preview channels.
Eurogamer
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