Saving text file to documentDirectory does not appear in Files app

I have pretty basic function for testing purposes to save a text file to File.app, but the created text file does not ever appear in the File.app.

  func saveDocToFiles() {

    let file = "DummyFile.txt"
    let contents = "some text"

    let resourceDocPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first! //replace with if let
    let fileURL = resourceDocPath.appendingPathComponent(file)

    do {
      try contents.write(to: fileURL, atomically: true, encoding: .utf8)
      print("successfully saved - document library \(self.getDocumentsDirectory())")
    } catch {
      print("oh no could not be saved")
    }
  }

I've added both keys below:

• Application supports iTunes file sharing
• Supports opening documents in place

While using a simulator if I browse to the document library the file is created. I've tested this on an actual device and the behavior is the same.

Am I missing a configuration for the file to appear in File.app?