Dynamic parameters in shortcuts

I need to have a dynamic parameter for Shortcuts, so a person can say something like Hey Siri, order a pizza with <insert app name here>

The parameter code in the appIntent is

@Parameter(title: "Title")
var itemName: String

In the Shortcut I use:

   AppShortcut(
        intent: NewItemIntent(),
        phrases: [
            "order \(\.$itemName) using \(.applicationName)"
        ],
        shortTitle: "Order Item",
        systemImageName: "sparkles"
    )

When I call it "hey Siri, order pizza using ***" where pizza should be passed via the parameter then handed off to the appintent. However, it ignores the spoken parameter in lieu of putting up a dialog asking "What's the name?" I can say "pizza" and it now works. How can I pick up the parameter without having to go to that second step as the code implies?