Fiat organise the delivery to dealers.
Like most manufacturers, Fiat now do the PDI (pre-delivery inspection), which is done at a facility at or near Portbury. Yours will be in the queue for processing and will take its turn. It should be identified as a sold vehicle, so should jump the queue ahead of stock vehicles. Then once done, it will await a transporter load to your area. This may be a whole load for one dealer, or may be spread across several in your region. As soon as a whole load is available, it will come.