kurokomario
As of VRChat 2024.2.3(337), it does not seem to work in game mode.
Game mode is now supported in iOS18.
This is expected to improve application performance and stability.
If possible, I would like it to support VRChat as well.
Here is Apple's explanation:
  • Maximize gameplay performance
Game Mode minimizes background activity to sustain consistently high frame rates for hours of continuous gameplay.
  • More responsive AirPods and controllers
Game Mode dramatically reduces audio latency with AirPods, and makes wireless game controllers incredibly responsive.