I have encountered similar issue with my Ulefone Armor 27T Pro, Chrome Browser. In fact, for most of the examples featured on the main website rendering of objects seems not to be working. The same is true for OnePlus Nord and Chrome.
In the AtomsSolids example only the springs are visible, while the spheres are not.
It seems to me that curves are rendering properly, while everything else is not working. I have encountered the same issue testing my own code for spheres and cylinders.
With regards,
Michał