Half the country? Not even close. The network doesn't even subscribe to the ratings service so Comcast and most other television providers cannot determine if contracting with OAN would make sense.
You demanded this in April 2020. You said then you would go back to Direct TV if Comcast didn't add it: "If you ignore this or cannot give me a date soon, I'm going back to Direct TV." There isn't any date for when or if Comcast will add OANN, and it's very doubtful they ever will. So, echoing @CCAndrew if you want OANN returning to Direct TV may be your only choice.
I have noticed a lot of customers on this forum asking for the OAN network. I personally have never seen one of their broadcasts, but I get the impression that they lean to the right, politically.
I think it's a safe bet that Comcast doesn't like OAN and will never add it to their channel line up, no matter what customers say. As CCAndrew put it, "The station’s ideals and values don’t line up with Comcast’s. Find another source, I doubt you’ll ever see it." So, Comcast decides what you can or can't see. Apparently some of the smut that's shown on other channels does line up with their "ideals and values". They have no problem broadcasting that, citing viewers' freedom of choice. Interestingly, I can no longer find the post with the above quote I just copied. I'm sure some of you saw it. It was probably deleted while I was typing. Anyone surprised?
People who want to watch OAN will have to take their business elsewhere. Complaining, sending requests, and threatening to leave are a waste of time. Comcast is more concerned with its own agenda. Forget about ideology or what you think is "fair". Other options are available now. Speak with your wallet.