You actually might be right the more I dig. The order guide 7/18 shows its not included or an option for the 802A. A build sheet in excel built by a user here shows its included in the 802A. Another excel build sheet shows its not an option or included.
If your dealer said its not an option its most likely not an option. The order guide is more official than build sheets built by users.
Car and Drivers online config tool also shows the kicker sub not included in the 802A package so when you add the kicker sub option with the 802A it removes the 802A option.
So I was wrong, your dealer is most likely correct.
The 802A package does not come with the kicker sub.