The Metaverse Standards Forum has had some activity around gaussian splats recently, for example debating whether it's too early to standardise.

There's a town hall on 5th March with speakers from Niantic and Cesium: https://metaverse-standards.org/event/gaussian-splats-town-h....

The previous splats town hall, and other related talks, are on the videos page (there was another gaussian splat talk a couple of days ago from Adobe). https://metaverse-standards.org/presentations-videos/