Maybe today the ACA is thought of as progressive, especially in the sense that the right wants it to end and the left doesn't; but in its time I think it was rightly understood as the Democrats caving to a massive transfer from the public to the private sector. I recall the private insurers' stock prices all going up 10-20% that week.
I saw a similar thing in the UK where the newly-minted Labour government thought they could combat ReformUK on asylum policy. Luckily, I think they're slowly starting to realise that, no matter how hard they tack, ReformUK will always promise something more insane and unworkable.
They'll find something on Zohran, or else he'll make some compromise that makes the left turn on him. It's just a matter of time.