Ford anticipated the urge of its buyers to want to take the Ranger with them on vacation. As such you can definitely flat tow a 2019 Ford Ranger, regardless of the trim, engine type, or drivetrain of the vehicle. The only thing you need to do is to put the Ranger in neutral. Failure to put the car in neutral could damage the transmission and drivetrain.
When in doubt, turn to page 256 of your 2019 Ford Ranger owner’s manual. This will outline everything you need to do before you flat tow the vehicle.