SF90 rear window

I recently noticed that some SF90 Stradale Assetto Fiorano's back window dosen't have the 3 louvres, so is the back window with the 3 louvres an extra option that has no connection with the Assetto Fiorano package? I don't know if it's included in the Assetto Fiorano package or you have to pay extra money to buy it even you choose the Assetto Fiorano Edition of SF90 Stradale.

Appreciate any help, thanks!