To make a splat, use an app such as scaniverse.
The easiest way to edit splats is with the SuperSplat editor.
To convert them into a good format or compress them so they are not as large, use splat-transform.
splat-transform assets/LSLBoilerRoom_V2.splat -H 1 -N -F 60% LSLBoilerRoom_V2_compressed60_SuperSplat.html
You can use our a-frame examples to bring a gaussian splat into an aframe scene from a .ply or .splat file, or the supersplat scenes are also viewable in VR.
You can also just upload your model to SuperSplat and then open it in VR.