Just add this lines in `ViewWillAppear(_ animated: Bool)` method of you CollectionViewController that you showing image in large scale:

DispatchQueue.main.async {
self.collectionView?.scrollToItem(at: selectedIndexPath, at: UICollectionView.ScrollPosition.centeredHorizontally, animated: false)
}

which selectedIndexPath is the indexPath that user selected in the collection list of photos.
Regards,