Good then that even WebGL mostly doesn't run on Khronos APIs ;) (only on Linux, although I don't know whether ANGLE is now actually using a Vulkan backend on Linux - which of course is also a Khronos API though).
Both WebGL2 and WebGPU are probably the most 'watertight' specced and tested 3D API ever built, and especially WebGPU has gone to great lengths to eliminate UB present in native APIs (even at the cost of usability).
The Android OS and the entire Android ecosystem being a huge pile of excrement isn't really surprising though. But it's 'too big to ignore' unfortunately, at least for browser APIs.
Both WebGL2 and WebGPU are probably the most 'watertight' specced and tested 3D API ever built, and especially WebGPU has gone to great lengths to eliminate UB present in native APIs (even at the cost of usability).