Found this on the Alfa Romeo website…
ALFA CONNECT SERVICES
Alfa Connect Services offers connectivity services for the new Giulia and Stelvio MY20, on which the Alfa Connect Box is standard and pre-activated. Alfa Connect Services allows you to stay in touch with your car remotely, thanks to the My Alfa Connect mobile app for smartphones and smartwatches.
Maybe try and connect remotely. Could be signal strength related. Who knows.