ViewModel.swift

@MainActor final class ViewModel: ObservableObject {
  let imageNames: [String]
        
  init(imageNames: [String]) {
    self.imageNames = imageNames
  }
        
  func load() {
    Task {
      let store = ImageStore()
      let images = try await withThrowingTaskGroup(of: UIImage.self, body: { group in
        imageNames.forEach { imageName in
          group.addTask {
            try await store.loadImage(named: imageName)
          }
        }
        return try await group.reduce(into: [UIImage](), { $0.append($1) })
      })
      self.images = images
    }
  }
        
  @Published var images = [UIImage]()
}

struct ImageStore {
  func loadImage(named name: String) async throws -> UIImage {
    return …
  }
}