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. External DisplayFixed a system crash when hotplugging a second display in Desktop mode
This beta update doesn’t change much, but the name of the update makes me think Valve is nearly ready to push 3.6 to stable.
You can follow news in this hub https://store.steampowered.com/news/app/1675200 . Each post contains the highlighted changes and updates.