Turning Talkback on and off on the Gemini Air

I am blind and I am considering purchasing the DirectTV Gemini Air streaming box , and I  want to know if I can turn on the "Talkback" screen reader with any shortcut keys on the remote. Obviously I can't do it with the settings menu on screen.  I don't have any sighted help.  DirectTV support has no clue, go figure!

I have asked Chat GPT if there was a shortcut key on the remote and I keep getting different answers. Below are the answers I have received so far:

Press and hold the "Menu" button for about 5 seconds.
Press and hold the "Exit" button for about 5 seconds.
Press the "Volume Up" and "Mute" buttons simultaneously for about 5 seconds.
Also, it was suggested to use the Google voice command feature on the voice remote to turn on the screen reader or "Talkback".

Could any of you try this out on your system and let me know what works?  It would be much appreciated!