With the new ImagePresentationComponent in visionOS 26, how can text/overlays be shown on top of the image as seen in the Spatial Gallery app?

Similar to the visionOS Spatial Gallery app, I'm developing a visionOS app that will show spatial photos and videos. Is it possible to re-create the horizontal (or a vertical) scrolling functionality that shows spatial photos and spatial video previews? Does the Spatial Gallery app use private APIs to create this functionality? I've been looking at the Quick Look documentation and have been able to use the PreviewApplication to show a single preview, but do not see anything for a collection of files as the Spatial Gallery app presents in the scrolling view. Any insights or direction on how this may be done is greatly appreciated.