Here's translated from Nintendo Japan website:
Nintendo Switch 2 System Update Version 23.0.0 — Full Patch Notes Released: September 10, 2026
GameChat
Chats you've previously joined now appear in the list of joinable chats
You can now start a new chat and join without selecting any friends
A "screen size" button has been added to the menu shown when pressing the C button during a chat
Virtual Game Cards
Added "Settings" to the Virtual Game Cards list screen
You can check the registration status of consoles using your virtual game cards
TV Mode
VRR output is now supported in TV mode
When both the software and TV support it, video is output at a refresh rate matching the game's processing
Note: Enabling this requires a Nintendo Switch 2 dock update
Full Transfer (Switch 2 → Switch 2)
You can now transfer save data, screenshots, and other data wholesale from your current Switch 2 to a new Switch 2 console
System Settings
Accessibility → Voice Reading
Added Portuguese (Brazil) voice reading
Accessibility → GameChat voice⇔text conversion
Added Portuguese (Brazil) to the text⇒speech languages
Audio → TV Sound
Settings are now saved individually for each connected
TV Display → Dock Output
Info Renamed to "Video Output Info"
You can now view in detail which video signals your connected TV supports
Display
Added a "VRR Settings" option
Mii
Added a feature to share your Mii as a QR code with other users
Sleep → Wake-from-sleep sound when playing on TV
You can now preview the sound immediately when adjusting its volume
System → Switch Software Behavior Mode
Added "Handheld Mode Boost quick-toggle in Quick Settings"
When ON, you can toggle Handheld Mode Boost from quick settings (hold HOME button)
System
Added a "Full Transfer to Nintendo Switch 2" option
Online License Fallback
If a virtual game card can't be moved from another console when launching software, you can now temporarily play via an online license
If the other console is offline and the card can't be moved, a "Play with Online License" button appears
Only the purchaser of the software can play via online license
Mii Editor BGM now plays on the Mii editing screen
Use the "BGM Settings" button (top-left) to switch or stop it
+You can now use other controllers even while Joy-Con 2 are attached to the console Play Activity Play time is now combined when the same software is played on multiple consoles Totals appear sequentially, starting with software played after the update
Fixed various issues and improved system stability
Caution: Only update the console in its normal state. Modifying the console or using unsupported accessories/software may render it inoperable after updating. Such consoles are not covered by warranty or repairs.
