I guess they are separate sensors as all 2021 Mustang's have FORD CO-PILOT360™ TECHNOLOGY
— Auto High-Beam Headlamps is standard on all series
— BLIS® (Blind Spot Information System) is standard on all series
— Lane-Keeping System (includes Lane-Keeping Assist, Lane-Keeping Alert and Driver Alert) is standard on all series
— Pre-Collision Assist with Automatic Emergency Braking (AEB) (Pedestrian Detection, Forward Collision Warning, Dynamic Brake Support) is standard on all series
— Rain-Sensing Wipers are now Standard
If it is the same sensor, not allowing ACC on the Mach 1 is really a bonehead move.