To create an Audio File of your Preset or Playlist, choose "Record to Audio File" from the Hamburger menu.

The play button will turn red.

When you hit play, the recording will begin. When playback is stopped, the recording ends and you'll see a ShareSheet so you can choose what to do with the file.

On iOS, I recommend installing an app called Audio Share. You can share the file to that app and then convert it to any format you like.