To use WebGL capabilities, you need a device and a browser that supports it. You can check which browsers support WebGL at caniuse.com by searching for WebGL.
According to caniuse.com, 98.16% of the internet users globally are using WebGL 3D Canvas graphics capable device and browser.
Unlike most Web APIs, WebGL is designed and maintained by the non-profit Khronos Group and not World Wide Web Consortium (W3C). WebXR Device APIs and other related APIs to create a 3D experience like Gamepad API are part of W3C.