Picking All in Folder or Playlist


I just bought the app for Android and thought I would also buy it for IOS. But when I got to the folder with music it didn’t offer the same choice to put all the songs in the playlist when you hold your finger down on the folder. Instead you have to pick the songs one at a time? Am I missing something or is this ability not a choice in IOS? Is there an easy way to pick more songs than one at a time?