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iOS Simulator can only render 1 RealityView

I'm using RealityView in my iOS game mxied with SwiftUI. For the following 2 example usages, the simulator will only render the first RealityView, and the second one is either super laggy or show a black model. Running on the real device is all good, just simualtor has this issue.

  1. Have a TabView and each tab has a RealityView.
  2. Have a root view and detail view connected via a push navigation, both root and detail have a RealityView.

In the Simulator, the second RealityView is going to be very choppy and basically unusable, but on a real iPhone everything looks great.

Is this a known simulator issue or I did something bad?

iOS Simulator can only render 1 RealityView
 
 
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