RetrivePHAssetFromPHPickerUIKitSample.swift

import UIKit
import PhotosUI

class ViewController: UIViewController {
    
    @IBAction func presentPickerForImagesIncludingLivePhotos(_ sender: Any) {
        presentPicker(filter: PHPickerFilter.images)
    }

    private func presentPicker(filter: PHPickerFilter) {
        let photoLibrary = PHPhotoLibrary.shared()  // PHAssetを取得するため
        
        var configuration = PHPickerConfiguration(photoLibrary: photoLibrary)
        configuration.filter = filter
        configuration.selectionLimit = 0
        
        let picker = PHPickerViewController(configuration: configuration)
        picker.delegate = self
        present(picker, animated: true)
    }
}

extension ViewController: PHPickerViewControllerDelegate {
    func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
        dismiss(animated: true)

        let identifiers = results.compactMap(\.assetIdentifier)
        let fetchResult = PHAsset.fetchAssets(withLocalIdentifiers: identifiers, options: nil)
        fetchResult.enumerateObjects { asset, index, pointer in
            print("アセット", asset)
        }
    }
}

PHAssetの情報を取り出したいならinfo.plistに追記必要

    <key>NSPhotoLibraryUsageDescription</key>
    <string>選択</string>

参考:

• https://developer.apple.com/documentation/photokit/selecting_photos_and_videos_in_ios
• https://stackoverflow.com/questions/62625797/how-to-retrieve-phasset-from-phpicker