It’s been covered before if you search the forums in regards to getting an active spoiler for the coupe model. Infact eBay sells entire looms/boot lid and coding kits.
Also I think it’s just laziness/ ignorance, but just considering the sportback and coupe body shape... how on earth would it fit?
Ones a 5 door hatch back open boot and the other a 3 door closed boot...I’m sure you can figure that one out to one of your questions.
~Alex