Direct TV streaming remote (Gemini) programming question

I have an older Samsung LED TV (Model: UN40J6200AF) and a Hitachi soundbar (Model: HSB32B26) that is connected via Optical cable.

The Gemini remote recognized the Samsung TV model and that is working correctly. However, the remote does not recognize the Hitachi soundbar.

Is there a way to integrate/add the Hitachi soundbar to the list of recognized Gemini sound devices?