RealityKit Target Framerate

I'm porting a scenekit app to RealityKit, eventually offering an AR experience there. I noticed that when I run it on my iPhone 15 Pro and iPad Pro with the 120Hz screen, the framerate seems to be limited to 60fps. Is there a way to increase the target framerate to 120 like I can with sceneKit?

I'm setting up my arView like so:

@IBOutlet private var arView: ARView! {
   didSet {
      arView.cameraMode = .nonAR
      arView.debugOptions = [.showStatistics]
   }
}