How to trigger InertiaProgress in Inertia + Laravel app

I have InertiaProgress instantiated as per the documentation in bootstrap.js in my Laravel app as

InertiaProgress.init({ includeCSS: true, });

However when I route to a page which has Inertia Component in it, no InertiaProgress is rendered in Vue 2.

Should I tap into the created or mounted method to do anything extra. The documentation in Inertia website doesn't help a great deal