Either after 1909 or a recent Intel Graphics update my wired external speakers somehow became deselected. I have a Mini desktop PC and in settings my external speakers were no longer selected. I re-selected them and they appear fixed.

You have to go here to reselect your external speakers.

PSA: 1909 or Intel Driver update confused external wired speakers-2019-11-22-13_13_07-settings.jpg

Just sharing if this helps someone.