我还没有弄清楚如何使用新的MusicLibraryRequest，所以我写了自己的实现。希望它能有所帮助。
第一步是创建一个具有canEdit属性的MLibraryPlaylist，因为这正是您想要的：

import Foundation
import MusicKit

public struct MLibraryPlaylist: Codable, MusicItem {
  public let id: MusicItemID
  public let attributes: Attributes

  public struct Attributes: Codable, Sendable {
    public let canEdit: Bool
    public let name: String
    public let isPublic: Bool
    public let hasCatalog: Bool
    public let playParams: PlayParameters
    public let description: Description?
    public let artwork: Artwork?
  }

  public struct Description: Codable, Sendable {
    public let standard: String
  }

  public struct PlayParameters: Codable, Sendable {
    public let id: MusicItemID
    public let isLibrary: Bool
    public let globalID: MusicItemID?

    enum CodingKeys: String, CodingKey {
      case id, isLibrary
      case globalID = "globalId"
    }
  }

  public var globalID: String? {
    attributes.playParams.globalID?.rawValue
  }
}

然后，使用Apple Music API获取媒体库播放列表，并将数据解码为MLibraryPlaylist（而非Playlist）的集合：

public typealias LibraryPlaylists = MusicItemCollection<LibraryPlaylist>

let libraryPlaylistsURL = URL(string: "https://api.music.apple.com/v1/me/library/playlists")

guard let libraryPlaylistsURL else { return }

let request = MusicDataRequest(urlRequest: URLRequest(url: libraryPlaylistsURL))
let response = try await request.response()
let playlists = try JSONDecoder().decode(LibraryPlaylists.self, from: response.data)

guard let playlist = playlists.first else { return }

print(playlist)
print(playlist.attributes.canEdit)

我希望它能解决你的问题！我知道它不如原生实现，在那里你也可以按上次播放日期过滤。