A known leaker and SteamVR data miner named Bradley Lynch reports that Valve is working on an Android emulator. Lynch has spotted five apps in a package on SteamDB, with two of them displaying new artwork that references Waydroid, an open-source and free Android emulator.
Honestly Steam is WAY overdue for an Android store.
Although it seems like putting the cart before the horse if they’re developing Android support for Steam Deck before launching a game store.