How to show PageView previews on both sides?

I'm using PageView to show a list of documents that are populated on the map. It seems, out of the box, FF default only shows one PageView at a time. According to Flutter code, there's the option to show preview of the next PageView by viewportFranction. See code snippet below. Another option that I came across was PageSnapping.

Two questions:

• Is it possible to show previews of the previous or next card in FF? If so, how?

• If not, how can I overwrite the FF PageView to embed viewportFraction control or utilize PageSnapping?

PageView(
  children: items,
  controller: PageController(
      viewportFraction: 0.8,
      initialPage: 0,
  )
)