@ionic/react IonPage is set to overflow: hidden

I am using ‘@ionic/react’.

I have been looking at the conference demo app for guidance as the documentation is still not very thorough. Available here: https://github.com/ionic-team/ionic-react-conference-app/blob/master/src/App.tsx

I have written this code https://github.com/o-t-w/ionic-component-lib/blob/master/src/App.tsx

I am putting my main content in IonPage but then realised in the devtools that IonPage is set to overflow:hidden, so content is cut off.

Where am I meant to put my main content if not inside the IonPage component?