I'm having the same problem as @lozzoc, my view controller is a standard UIViewController, there is a UICollectView on the page along with other UI elements. I have added an extension for my view controller that implements UICollectionViewDataSource // MARK: - UICollectionViewDataSource func numberOfSections(in collectionView: UICollectionView) -> Int { if #available(iOS 14.0, *) { os_log(.debug, "UICollectionViewDataSource: numberOfSections: 1") } return 1 } func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { if #available(iOS 14.0, *) { os_log(.debug, "UICollectionViewDataSource: numberOfItemsInSection: \(self.searchTerms.count)") } return searchTerms.count } func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { if #available(iOS 14.0, *) { os_log(.debug, "UICollectionViewDataSource: cellForItemAt: \(indexPath)") } return cell(from: collectionView, for: indexPath) } func cell(from collectionView: UICollectionView, for indexPath: IndexPath) -> SearchTermCell { if #available(iOS 14.0, *) { os_log(.debug, "RecomendedPageContentViewController: for \(indexPath)") } func extractViewModel(at indexPath: IndexPath) -> SearchTermCell.ViewModel { if #available(iOS 14.0, *) { os_log(.debug, "extractViewModel: at \(indexPath)") } let viewModel: SearchTermCell.ViewModel let value = getData(for: indexPath) viewModel = self.viewModel(for: value) return viewModel } let cell: SearchTermCell = collectionView.dequeueReusableCell(withReuseIdentifier: "SearchTermCell", for: indexPath) as! SearchTermCell configure(cell: cell, with: extractViewModel(at: indexPath)) cell.setNeedsLayout() cell.sizeToFit() return cell } I included cell(from collectionView: UICollectionView, for indexPath: IndexPath), but cellForItemAt is never called. The collection view is connected to the view controller (via a Storyboard) @IBOutlet weak var collectionView: UICollectionView! in viewDidLoad the view controller is assigned as the datasource self.collectionView.dataSource = self In the storyboard the UICollectViewCell has its class set to my custom UICollectionViewCell class SearchTermCell: UICollectionViewCell { @IBOutlet private weak var searchLabel: UILabel! var viewModel = ViewModel() { didSet { backgroundColor = UIColor.appColor(.title) searchLabel.text = viewModel.title searchLabel.font = .titleFont searchLabel.textColor = UIColor.appColor(.cellBackColour) if #available(iOS 14.0, *) { os_log(.debug, """ ----------------------------- searchLabel.text: \(self.viewModel.title) ----------------------------- """) } } } } Any ideas would be appreciated.