I'm trying to share anchors from WebXR over the network with other clients. However, they only have one property, anchorSpace, which itself doesn't have any properties:

hitTestResult.createAnchor().then((anchor) => {
  console.log(anchor)
});

The above code produces following output in the console:

XRAnchor {anchorSpace: XRSpace}
  anchorSpace: XRSpace
    [[Prototype]]: XRSpace
  [[Prototype]]: XRAnchor

Stringifying the anchor using JSON.stringify() returns the following:

{}

Is there any way to send anchors (or XRSpaces) from one client to the other? And how can XRAnchor and XRSpace even work if they seemingly don't store any data?