Saving and Sharing Screenshots -- WebAR


I am creating a WebAR experience with a screenshot button. When I preview this experience in the Zappar (IOS) app, I am able to take a screenshot, save it to my photos, and share the photo. When testing it in my browser, the only option available after screenshotting is to save to files, not photos.

Is there any way to save a screenshot to photos and share it when using WebAR? Is this feature only available when scanning a ZapCode with the Zappar app?

Thanks in advance!