AFAICT, this is a web standard and expected to get buy in from Safari and Firefox before shipping to users. For now it's an experiment you have to specifically enable with flags. No different than any other browser that runs experiments
Here's one from from Apple from 2017
https://webkit.org/blog/7504/webgpu-prototype-and-demos/
Here's another from last year
https://webkit.org/blog/17118/a-step-into-the-spatial-web-th...