Your dealer needs to "mark" the truck as delivered in the Ford system. Go on to your Ford.com account and see if the truck is marked as delivered. Once this is done, SunRun will call you and confirm your address and then you should receive the charger shortly. I have heard people get the delivery within a week of their truck being delivered, others it takes 2-3 weeks.
I'm not sure why they can't just be shipped with the truck but this is the deal Ford made with SunRun.