All Vision settings
Settings Pathfinder · Vision
Automatic Updates
Downloads and installs visionOS updates overnight while charging and on Wi-Fi.
In visionOS 27
Settings then General then Software Update then Automatic Updates then Automatically Install
“Tap Automatic Updates, then turn on Automatically Install.” — Apple User Guide
Where it has lived
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visionOS 26 and later
Settings then General then Software Update then Automatic Updates then Automatically Install
Checked against Apple's User Guides from visionOS 26 onward. Menus can differ slightly by region, language, model and installed apps.