Note: This update is for the Steam Deck Beta and Preview channels, and includes new features that are still being tested. You can opt into this in Settings > System > System Update Channel.
The Steam Client Beta has been updated with the following changes:
Steam Input
Added support for the PowerA Nintendo Switch Nano Wired Controller
Desktop Mode
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Fix microtransactions dialog failing to reopen if the Steam overlay was closed without canceling the transaction.
Source: https://store.steampowered.com/news/app ... 3691434908