But this is the crucial piece that distinguishes the public option or ACA expansion from M4A. The question is clearly referring to a single-payer system. There’s no way around that.
Also, the polls in some states asked voters about publicly funded college, which was broadly supported. Those are 2 of Sanders’ major proposals.
The GND is the one major piece that was left out of these exit polls. However, it is favored by a majority of Democratic voters per other polling: https://www.google.com/amp/s/www.vox.com/platform/amp/energy-and-environment/2019/4/22/18510518/green-new-deal-fox-news-poll
That same article notes that right-wing media has mobilized republican voters against the GND. This is the same exact thing that has been done countless times, including against the ACA. The same thing will be done against Obamacare 2.0 when they turn their sights fully on Biden. It’s also worth noting Biden has his own diminished GND plan and you can expect no distinctions to be made on Fox. The article does offer some interesting commentary on media.