Just following on alfredyay's post.
I've also been looking at how to get a valid URL to host a .glb using squarespace and its seems that amazon s3 is the best way to do it.
Does anyone know the set up in s3 required to make the .glb run. I.e. the permissions required on both the bucket setup, permissions on the actual .glb file and any cors permissions (or other factors)
I'm pretty sure the code set up I have is fine on the squarespace site as I can get the default dev model astronaut to appear. I've also managed to set up a poster images via an s3 url and that loads ok - it's just the .glb that I can't get to load.
The .glb works on the model editor tester too.
Any advice most appreciated.