The embedded scene is the original demo scene by Shapespark - 3D scene
And the iframe code was copied from your post
https://forum.shapespark.com/t/full-page-shapespark-iframe
We’ve managed to make things work on Android by adding “allowvr=yes” and “allow=xr-spatial-tracking” permissions. However, the issue remains for iOS devices.
We are suspecting that since XR isn’t yet compatible with safari browser, things aren’t working. Trying to find a fix for this