Nope, they are typically meant to produce downforce and that creates drag, so they do the opposite, slow you down. That’s why f1 cars have DRS (drag reduction system) capable wings so that they can reduce the downforce, typically needed to go really fast around turns, on the wide straight away passing zones.Would an oversize rear spoiler give you better acceleration ?
I do recall unplugged performance having a rear spoiler for the model 3 that was engineered to make the car more aerodynamic by reducing drag but it’s not by much.