Mild Spoilers Ahead
While it has been a long-standing debate over whether or not the Pizza Planet Truck has appeared in the Incredibles, it was confirmed that the truck would make an appearance in Incredibles 2. Specifically the truck would be “in period” as well, which would make the usually easy to spot pickup truck slightly tougher to find.
Upon first viewing I was scanning the wide primary shots with massive amounts of cars that occurred multiple times during the movie thinking that the truck would be hidden far off in the distance.
Once it was revealed that Screenslaver was “just a pizza guy” I think it’s pretty clear where to look for the truck upon a second viewing.