You mean just the live feed without the telemetry / app overlay? I think this is only possible using the Smart Controller on drones before Mavic 3 (and with Mavic 3 you need the RC Pro).
I haven't tested it yet but these Controllers have a (mini)HDMI port for passing on the live feed.
I don't know if it's different with the Enterprise line of the Mavic 2 but if the Smart Controller is compatible, the video feed should also work.