Adding Add To Cart or Custom Links to WebAR scenes
Both iOS and Android support embedding links into their WebAR viewers. iOS offers a more robust set of features than Android. These allow you to direct WebAR users to PDP and add to cart links and drive purchase from WebAR.
iOS Adding an Apple Pay Button or a Custom Action in AR Quick Look
In iOS 13+ iOS quick view now supports embedding buttons or actions into the WebAR experience.
How to can be found here: Adding an Apple Pay Button or a Custom Action in AR Quick Look | Apple Developer Documentation
Android Using Scene Viewer to display interactive 3D models in AR from an Android app or browser
Android supports a URL for an external webpage. If present, a button will be surfaced in the UI that intents to this URL when clicked.
How to can be found here: Using Scene Viewer to display interactive 3D models in AR from an Android app or browser | ARCore | Google Developers