You can use the "Make spoken audio from" and "play audio file" actions available to Shortcuts. I was able to get it to play from the Mac dock using this method.

You can use the "Make spoken audio from" and "play audio file" actions available to Shortcuts. I was able to get it to play from the Mac dock using this method. Screenshot: https://imgur.com/a/EFdyAxF https://imgur.com/a/EFdyAxF