SwiftUI to UIKit - missing thumbnail assets when wrapping

Hello!

I am using the wrapper, UIHostController. It is doing what it is designed to do - to wrap my SwiftUI components in a UIKit project.I have AR components that I have stored locally in my mac it would appear on the bottom showing an HStack with the thumbnails. When pressed it would load. When I run the entire code - it works fine in SwiftUI when I am just calling ContentsView. As for pushing it to UIKit, it appears the thumbnails on the bottom are missing.

Here is my Host Controller code for wrapping:

import UIKit
import SwiftUI
import AVFoundation


class ARHostingController: UIViewController{
   

  let arView = UIHostingController(rootView: ContentsView())
  private var heightConstraint: NSLayoutConstraint?
   
  override func viewDidLoad() {
    super.viewDidLoad()
    
     
    heightConstraint = arView.view.heightAnchor.constraint(equalToConstant: 0)
     
    addChild(arView)
    view.addSubview(arView.view)
    
     
    arView.didMove(toParent: self)
    // arView.view.sizeToFit()
    setupConstraints()
  }
  override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()


    arView.view.sizeToFit()
    heightConstraint?.constant = arView.view.bounds.height
    heightConstraint?.isActive = true
  }
   
   

  fileprivate func setupConstraints() {
    arView.view.translatesAutoresizingMaskIntoConstraints = false
    arView.view.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
    arView.view.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
    arView.view.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
    arView.view.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
     
 
  }

ContentsView (in SwiftUI) code:

`import SwiftUI

struct ContentsView: View {

  
  @State private var isPlacementEnabled = false
  @State private var selectedModel: Model?
  @State private var modelConfirmedForPlacement: Model?
   
  
   
  private var models: [Model] = {
    let fileManager = FileManager.default
    guard let path = Bundle.main.resourcePath,
       let files = try? fileManager.contentsOfDirectory(atPath: path) else {
      return []
    }
    return files
      .filter { $0.hasSuffix(".usdz") }
      .compactMap { $0.replacingOccurrences(of: ".usdz", with: "") }
      .compactMap { Model(modelName: $0 ) }
  }()

 
   
  var body: some View {
    ZStack(alignment: .bottom) {
      ARViewRepresentable(
        modelConfirmedForPlacement: $modelConfirmedForPlacement
      )

      if isPlacementEnabled {
        PlacementButtonView(
          isPlacementEnabled: $isPlacementEnabled,
          selectedModel: $selectedModel,
          modelConfirmedForPlacement: $modelConfirmedForPlacement
        )
      } else {
        ModelPickerView(
          isPlacementEnabled: $isPlacementEnabled,
          selectedModel: $selectedModel,
          models: models
        )
      }
    }
//    .onAppear(){
//      self.viewModel.fetchData()
//    }
  }
}`