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:
Remote Play
Fixed device authorization dialog not showing if Steam Link connects while Steam is starting up
Steam Input
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Added the ability to bind Steam Input API trigger actions to button inputs
Source: https://store.steampowered.com/news/app ... 5959265311