In the Portfolio Instant App, when you create a web map section, the app will display a link to the web map in the description ("Open in Map Viewer"), as well as displaying any Terms of Use attached to your web map below the link.
The only way to hide these is by hiding the entire Description for the section, which is not ideal.
I want to add descriptive text to the Description section, and as it happens, I want to include a link to an app (WAB) showcasing the web map. Having a link directly to the web map in the Map Viewer is just going to confuse end users and redirect traffic away from the app, where I want people to go.
I don't actually mind having the Terms of Use shown, but it would be nice to have options to hide both of these elements, so that the live app reflects what you have configured in the Description.